From: leonard78sp on
                                                  SI / USGS
                                 Weekly Volcanic Activity Report

                                                
                                           
14 July-20 July 2010
                                    3 New+ 12 Ongoing =  15 active

           New Activity/Unrest:

| Gorely, Southern Kamchatka (Russia)
| Soufrière Hills, Montserrat
| Ubinas, Perú

Ongoing Activity:

| Batu Tara, Komba Island (Indonesia)
| Fuego, Guatemala
| Karymsky, Eastern Kamchatka (Russia)
| Kilauea, Hawaii (USA)
| Kliuchevskoi, Central Kamchatka (Russia)
| Nevado del Ruiz, Colombia
| Pacaya, Guatemala
| Sakura-jima, Kyushu
| Santa María, Guatemala
| Shiveluch, Central Kamchatka (Russia)
| Suwanose-jima, Ryukyu Islands (Japan)
| Tungurahua, Ecuador


                        Weekly Report Editor Sally Kuhn Sennert -

                         http://www.volcano.si.edu/reports/

                         http://www.volcano.si.edu/reports/usgs

             This page is updated on Wednesdays, please
             see the GVP Home Page for news of the
             latest significant activity.

             The Weekly VolcanicActivityReport is a
             cooperative project between the Smithsonian's
             Global Volcanism Program and the US
             Geological Survey'sVolcanoHazards Program.

             Updated by 2300 UTC every Wednesday,
             notices of volcanicactivityposted on these pages
             are preliminary and subject to change as events
             are studied in more detail.
             This is not a comprehensive list of all of
Earths volcanos erupting during theweek, but
rather a summary of activity at volcanoes that
meet criteria discussed in detail in the "Criteria
and Disclaimers" section. Carefully reviewed,
             detailed reports on variousvolcanosare
             published monthly in the Bulletin of the
             Global Volcanism Network.

             Note: Many news agencies do not archive the
             articles they post on the Internet, and therefore
             the links to some sources may not be active. To
             obtain information about the cited articles that
             are no longer available on the Internet contact
             the source.

                                    New Activity/Unrest



From: leonard78sp on
Expanded detail omitted
                                                   SI / USGS
                                  Weekly Volcanic Activity Report

                                                 
                                            
                                           14 July-20 July 2010
                                     3 New+ 12 Ongoing =  15 active

            New Activity/Unrest:

| Gorely, Southern Kamchatka (Russia)
| Soufrière Hills, Montserrat
| Ubinas, Perú

           Ongoing Activity:

| Batu Tara, Komba Island (Indonesia)
| Fuego, Guatemala
| Karymsky, Eastern Kamchatka (Russia)
| Kilauea, Hawaii (USA)
| Kliuchevskoi, Central Kamchatka (Russia)
| Nevado del Ruiz, Colombia
| Pacaya, Guatemala
| Sakura-jima, Kyushu
| Santa María, Guatemala
| Shiveluch, Central Kamchatka (Russia)
| Suwanose-jima, Ryukyu Islands (Japan)
| Tungurahua, Ecuador

                         Weekly Report Editor Sally Kuhn Sennert -

                          http://www.volcano.si.edu/reports/

                          http://www.volcano.si.edu/reports/usgs

              This page is updated on Wednesdays, please
              see the GVP Home Page for news of the
              latest significant activity.

              The Weekly VolcanicActivityReport is a
              cooperative project between the Smithsonian's
              Global Volcanism Program and the US
              Geological Survey'sVolcanoHazards Program.

              Updated by 2300 UTC every Wednesday,
              notices of volcanicactivityposted on these pages
              are preliminary and subject to change as events
              are studied in more detail.
              This is not a comprehensive list of all of
              Earths volcanos erupting during theweek, but
              rather a summary of activity at volcanoes that
              meet criteria discussed in detail in the "Criteria
              and Disclaimers" section. Carefully reviewed,
              detailed reports on variousvolcanosare
              published monthly in the Bulletin of the
              Global Volcanism Network.

              Note: Many news agencies do not archive the
              articles they post on the Internet, and therefore
              the links to some sources may not be active. To
              obtain information about the cited articles that
              are no longer available on the Internet contact
              the source.

                                     New Activity/Unrest

GORELY Southern Kamchatka (Russia) 52.558°N, 158.03°E; summit elev.
1829 m

KVERT reported that during 9-16 July seismic activity from Gorely was
above background levels,
and gas-and-steam emissions rose from the crater most days. On 10
July, data suggested that the
vent on the crater's inner NE wall, above the level of the lake, had
grown by 2-3 times the original
size. The lake level had also fallen. Analysis of satellite imagery
showed a thermal anomaly over
Gorely on 8, 10, 12, and 14 July, and gas-and-steam plumes that
drifted 25-150 km SE, E, and S
during 10 and 14-15 July. The Level of Aviation Color Code remained at
Yellow.

Geologic Summary. Gorely volcano, one of the most active in southern
Kamchatka, consists of five small overlapping stratovolcanoes
constructed along a WNW-ESE line within a large 9 x 13.5 km late-
Pleistocene caldera. The massive Gorely complex contains 11 summit and
30 flank craters. During the early Holocene, activity was
characterized by frequent mild eruptions with occasional larger
explosions and lava flows that filled in the caldera. Quiescent
periods became longer between 6,000 and 2,000 years ago, after which
the activity was mainly explosive. About 600-650 years ago
intermittent strong explosions and lava flow effusion accompanied
frequent mild eruptions. Historical eruptions have consisted of
vulcanian and phreatic explosions of moderate volume.

Map

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Gorely Information from the Global Volcanism Program

SOUFRIERE HILLS Montserrat 16.72°N, 62.18°W; summit elev. 915 m

MVO reported that activity at Soufrière Hills was low during 9-16
July. Helicopter observations on 15 July revealed no major changes to
the lava dome, although there were some fresh rockfall and small
pyroclastic-flow deposits at the head of the Gages valley to the W.
The next day, heavy rainfall generated a few lahars in the Belham
valley to the NW. The Hazard Level remained at 3.

Geologic Summary. The complex dominantly andesitic Soufrière Hills
volcano occupies the southern half of the island of Montserrat. The
summit area consists primarily of a series of lava domes emplaced
along an ESE-trending zone. English's Crater, a 1-km-wide crater
breached widely to the E, was formed during an eruption about 4,000
years ago in which the summit collapsed, producing a large submarine
debris avalanche. Block-and-ash flow and surge deposits associated
with dome growth predominate in flank deposits at Soufrière Hills. Non-
eruptive seismic swarms occurred at 30-year intervals in the 20th
century, but with the exception of a 17th-century eruption that
produced the Castle Peak lava dome, no historical eruptions were
recorded on Montserrat until 1995. Long-term small-to-moderate ash
eruptions beginning in that year were later accompanied by lava-dome
growth and pyroclastic flows that forced evacuation of the southern
half of the island and ultimately destroyed the capital city of
Plymouth, causing major social and economic disruption.

Map

Source: Montserrat Volcano Observatory (MVO)

Soufrière Hills Information from the Global Volcanism Program

UBINAS Perú 16.355°S, 70.903°W; summit elev. 5672 m

Based on a pilot observation and analyses of satellite imagery, the
Buenos Aires VAAC reported that on 18 July an ash plume from Ubinas
drifted NE. A subsequent report about 12 hours later stated that no
further activity was seen.

Geologic Summary. A small, 1.2-km-wide caldera that cuts the top of
Ubinas, Peru's most active volcano, gives it a truncated appearance.
Ubinas is the northernmost of three young volcanoes located along a
regional structural lineament about 50 km behind the main volcanic
front of Peru. The upper slopes of the stratovolcano, composed
primarily of Pleistocene andesitic lava flows, steepen to nearly 45
degrees. The steep-walled, 150-m-deep summit caldera contains an ash
cone with a 500-m-wide funnel-shaped vent that is 200 m deep. Debris-
avalanche deposits from the collapse of the SE flank of Ubinas extend
10 km from the volcano. Widespread Plinian pumice-fall deposits from
Ubinas include some of Holocene age. Holocene lava flows are visible
on the volcano's flanks, but historical activity, documented since the
16th century, has consisted of intermittent minor explosive eruptions.

Map

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

Ubinas Information from the Global Volcanism Program

Ongoing Activity

BATU TARA Komba Island (Indonesia) 7.792°S, 123.579°E; summit elev.
748 m

Based on analyses of satellite imagery, the Darwin VAAC reported that
during 18-20 July ash plumes from Batu Tara rose to an altitude of 1.5
km (5,000 ft) a.s.l. and drifted more than 35 km NW.

Geologic Summary. The small isolated island of Batu Tara in the Flores
Sea about 50 km north of Lembata (formerly Lomblen) Island contains a
scarp on the eastern side similar to the Sciara del Fuoco of Italy's
Stromboli volcano. Vegetation covers the flanks of Batu Tara to within
50 m of the 748-m-high summit. Batu Tara lies north of the main
volcanic arc and is noted for its potassic leucite-bearing basanitic
and tephritic rocks. The first historical eruption from Batu Tara,
during 1847-52, produced explosions and a lava flow.

Map

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Batu Tara Information from the Global Volcanism Program

FUEGO Guatemala 14.473°N, 90.880°W; summit elev. 3763 m

INSIVUMEH reported on 19 July that six explosions from Fuego produced
ash plumes that rose to an altitude of 4.4 km (14,400 ft) a.s.l. and
drifted W and SW. Rumbling and "degassing" sounds were associated with
the explosions. Light ashfall was reported in Sangre de Cristo, 10 km
WSW. The seismic network had recorded a total of 17 explosions within
the previous 24 hours.

Geologic Summary. Volcán Fuego, one of Central America's most active
volcanoes, is one of three large stratovolcanoes overlooking
Guatemala's former capital, Antigua. The scarp of an older edifice,
Meseta, lies between 3,763-m-high Fuego and its twin volcano to the N,
Acatenango. Construction of Meseta volcano continued until the late
Pleistocene or early Holocene, after which growth of the modern Fuego
volcano continued the southward migration of volcanism that began at
Acatenango. Frequent vigorous historical eruptions have been recorded
at Fuego since the onset of the Spanish era in 1524, and have produced
major ashfalls, along with occasional pyroclastic flows and lava
flows. The last major explosive eruption from Fuego took place in
1974, producing spectacular pyroclastic flows visible from Antigua.

Map

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia,
e Hidrologia (INSIVUMEH)

Fuego Information from the Global Volcanism Program

KARYMSKY Eastern Kamchatka (Russia) 54.05°N, 159.45°E; summit elev.
1536 m

KVERT reported that satellite imagery showed ash plumes from Karymsky
drifting 30 km W and S on 7 and 8 July and a thermal anomaly over the
volcano during 8-10 and 12 July. Seismic activity was above background
levels during 12-14 July and suggested that possible ash plumes rose
to an altitude of 3.3 km (10,800 ft) a.s.l. Seismic data were not
available other days during 9-16 July due to technical problems. Based
on analyses of satellite imagery, the Tokyo VAAC reported that on 19
July a possible eruption produced a plume that rose to an altitude of
1.5 km (5,000 ft) a.s.l. and drifted SW. Ash was noted and then later
dissipated. A possible eruption was reported the next day, and again a
subsequent satellite image showed that ash had dissipated within a few
hours. The Aviation Color Code level remained at Orange.

Geologic Summary. Karymsky, the most active volcano of Kamchatka's
eastern volcanic zone, is a symmetrical stratovolcano constructed
within a 5-km-wide caldera that formed about 7,600-7,700 radiocarbon
years ago. Construction of the Karymsky stratovolcano began about
2,000 years later. The latest eruptive period began about 500 years
ago, following a 2,300-year quiescence. Much of the cone is mantled by
lava flows less than 200 years old. Historical eruptions have been
Vulcanian or Vulcanian-Strombolian with moderate explosive activity
and occasional lava flows from the summit crater. Most seismicity
preceding Karymsky eruptions has originated beneath Akademia Nauk
caldera, which is located immediately S of Karymsky volcano and
erupted simultaneously with Karymsky in 1996.

Map

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo
Volcanic Ash Advisory Center (VAAC)

Karymsky Information from the Global Volcanism Program

KILAUEA Hawaii (USA) 19.421°N, 155.287°W; summit elev. 1222 m

During 14-20 July HVO reported that activity at Kilauea continued from
the summit and the east rift zone. At the summit, the level of a lava-
pool surface in the deep pit within the floor of Halema'uma'u crater
remained mostly stable; glow from the vent was also visible at night.
A plume from the vent mainly drifted SW. At the east rift zone, two
lava flows that broke out of the TEB lava-tube system advanced E
through the coastal highway 130/137 intersection beginning on 17 July,
and by 19 July were within 70 m of the nearest structure. A second set
of active lava lobes were approximately 1 km to the NW and also
advanced toward that general area. According to a news article, two
people evacuated their home in Kalapana due to advancing lava flows.

Geologic Summary. Kilauea, one of five coalescing volcanoes that
comprise the island of Hawaii, is one of the world's most active
volcanoes. Eruptions at Kilauea originate primarily from the summit
caldera or along one of the lengthy E and SW rift zones that extend
from the caldera to the sea. About 90% of the surface of Kilauea is
formed of lava flows less than about 1,100 years old; 70% of the
volcano's surface is younger than 600 years. A long-term eruption from
the East rift zone that began in 1983 has produced lava flows covering
more than 100 sq km, destroying nearly 200 houses and adding new
coastline to the island.

Map

Sources: US Geological Survey Hawaiian Volcano Observatory (HVO),
Associated Press

Kilauea Information from the Global Volcanism Program

KLIUCHEVSKOI Central Kamchatka (Russia) 56.057°N, 160.638°E; summit
elev. 4835 m

KVERT reported that during 9-16 July seismic activity from
Kliuchevskoi was above background levels. Satellite imagery analysis
showed a large daily thermal anomaly over the volcano and a gas-and-
ash plume that drifted 45 km NW on 14 July. Strombolian activity and
gas-and-ash emissions were observed during 9, 12, and 14-15 July. Ash
plumes occasionally rose to an altitude of 6.8 km (22,300 ft) a.s.l.
Based on analyses of satellite imagery and information from KVERT, the
Tokyo VAAC reported a possible eruption on 17 July. Ash was seen in
satellite imagery and then later dissipated. An eruption on 19 July
and a possible eruption the next day produced plumes that rose to
altitudes of 5.2-5.5 km (17,000-18,000 ft) a.s.l. and drifted SW and
SE. The Aviation Color Code level remained at Orange.

Geologic Summary. Kliuchevskoi is Kamchatka's highest and most active
volcano. Since its origin about 7,000 years ago, the beautifully
symmetrical, 4,835-m-high basaltic stratovolcano has produced frequent
moderate-volume explosive and effusive eruptions without major periods
of inactivity. More than 100 flank eruptions, mostly on the NE and SE
flanks of the conical volcano between 500 m and 3,600 m elevation,
have occurred during the past 3,000 years. The morphology of its 700-m-
wide summit crater has been frequently modified by historical
eruptions, which have been recorded since the late-17th century.
Historical eruptions have originated primarily from the summit crater,
but have also included major explosive and effusive events from flank
craters.

Map

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo
Volcanic Ash Advisory Center (VAAC)

Kliuchevskoi Information from the Global Volcanism Program

NEVADO DEL RUIZ Colombia 4.895°N, 75.322°W; summit elev. 5321 m

The Washington VAAC reported that a plume at an altitude of 7 km
(23,000 ft) a.s.l. from a possible eruption from Nevado del Ruiz on 17
July was stated in a Bogota MWO SIGMET notice. A second VAAC report
less than an hour later noted a brief seismic signal alert had been
issued and that meteorological cloud cover prevented observations of
the volcano. Ash was not seen in satellite imagery later that day nor
were there any additional reports of activity. [INGEOMINAS later
confirmed that no eruption had occurred.]

Geologic Summary. Nevado del Ruiz is a broad, glacier-covered volcano
in central Colombia that covers >200 sq km. Three major edifices,
composed of andesitic and dacitic lavas and andesitic pyroclastics,
have been constructed since the beginning of the Pleistocene. The
modern cone consists of a broad cluster of lava domes built within the
summit caldera of an older Ruiz volcano. The 1-km-wide, 240-m-deep
Arenas crater occupies the summit. Steep headwalls of massive
landslides cut the flanks of Nevado del Ruiz. Melting of its summit
icecap during historical eruptions, which date back to the 16th
century, has resulted in devastating lahars, including one in 1985
that was South America's deadliest eruption.

Map

Source: Washington Volcanic Ash Advisory Center (VAAC)

Nevado del Ruiz Information from the Global Volcanism Program

PACAYA Guatemala 14.381°N, 90.601°W; summit elev. 2552 m

INSIVUMEH reported that, after an increase in Pacaya's activity on 13
July, a decrease in seismicity was noted on 14 July. Strombolian
explosions occurred on 14 July at 5-10 minute intervals, and
occasional small pyroclastic flows traveled S. Gray ash plumes rose
500 m and drifted WSW. On 19 July, fumarolic plumes rose 100 m above
MacKenney crater and drifted N. The seismic network had recorded a
total of 120 explosions within the previous 24 hours. On 20 July
Strombolian explosions generated ash plumes that rose 100 m and
drifted 2 km N.

Geologic Summary. Eruptions from Pacaya, one of Guatemala's most
active volcanoes, are frequently visible from Guatemala City, the
nation's capital. Pacaya is a complex volcano constructed on the
southern rim of the 14 x 16 km Pleistocene Amatitlan caldera. A
cluster of dacitic lava domes occupies the caldera floor. The Pacaya
massif includes the Cerro Grande lava dome and a younger volcano to
the SW. Collapse of Pacaya volcano about 1,100 years ago produced a
debris-avalanche deposit that extends 25 km onto the Pacific coastal
plain and left an arcuate somma rim inside which the modern Pacaya
volcano (MacKenney cone) grew. During the past several decades,
activity at Pacaya has consisted of frequent Strombolian eruptions
with intermittent lava flow extrusion on the flanks of MacKenney cone,
punctuated by occasional larger explosive eruptions.

Map

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia,
e Hidrologia (INSIVUMEH)

Pacaya Information from the Global Volcanism Program

SAKURA-JIMA Kyushu 31.585°N, 130.657°E; summit elev. 1117 m

Based on JMA notices, the Tokyo VAAC reported explosions from Sakura-
jima on 14 and 20 July. During 15-18 July pilots observed ash plumes
that rose to altitudes of 1.8-3.4 km (6,000-11,000 ft) a.s.l. and
drifted NE, N, and NW. Plumes on 20 July rose as high as 2.1 km (7,000
ft) a.s.l. and drifted NW and N.

Geologic Summary. Sakura-jima, one of Japan's most active volcanoes,
is a post-caldera cone of the Aira caldera at the northern half of
Kagoshima Bay. Eruption of the voluminous Ito pyroclastic flow was
associated with the formation of the 17 x 23-km-wide Aira caldera
about 22,000 years ago. The construction of Sakura-jima began about
13,000 years ago and built an island that was finally joined to the
Osumi Peninsula during the major explosive and effusive eruption of
1914. Activity at the Kita-dake summit cone ended about 4,850 years
ago, after which eruptions took place at Minami-dake. Frequent
historical eruptions, recorded since the 8th century, have deposited
ash on Kagoshima, one of Kyushu's largest cities, located across
Kagoshima Bay only 8 km from the summit. The largest historical
eruption took place during 1471-76.

Map

Source: Tokyo Volcanic Ash Advisory Center (VAAC)

Sakura-jima Information from the Global Volcanism Program

SANTA MARIA Guatemala 14.756°N, 91.552°W; summit elev. 3772 m

INSIVUMEH reported that 16 explosions from Santa María's Santiaguito
lava dome complex during 19-20 July produced ash plumes that rose
300-900 m above Santiaguito and drifted SE and W. Ashfall was reported
downwind in San José and La Quina. The seismic network had recorded a
total of 24 explosions within the 48 hour period.

Geologic Summary. Symmetrical, forest-covered Santa María volcano is
one of a chain of large stratovolcanoes that rises dramatically above
the Pacific coastal plain of Guatemala. The stratovolcano has a sharp-
topped, conical profile that is cut on the SW flank by a large, 1-km-
wide crater, which formed during a catastrophic eruption in 1902 and
extends from just below the summit to the lower flank. The renowned
Plinian eruption of 1902 followed a long repose period and devastated
much of SW Guatemala. The large dacitic Santiaguito lava-dome complex
has been growing at the base of the 1902 crater since 1922. Compound
dome growth at Santiaguito has occurred episodically from four
westward-younging vents, accompanied by almost continuous minor
explosions and periodic lava extrusion, larger explosions, pyroclastic
flows, and lahars.

Map

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia,
e Hidrologia (INSIVUMEH)

Santa María Information from the Global Volcanism Program

SHIVELUCH Central Kamchatka (Russia) 56.653°N, 161.360°E; summit elev.
3283 m

KVERT reported that during 9-16 July seismic activity from Shiveluch
was above background levels and suggested that possible ash plumes
rose to an altitude of 4.3 km (12,100 ft) a.s.l. Satellite imagery
showed a large daily thermal anomaly over the lava dome. Gas-and-steam
plumes were seen rising to an altitude of 3.7 km (12,100 ft) a.s.l.
during 9 and 11-14 July. Based on analysis of satellite imagery, the
Tokyo VAAC reported a possible eruption on 19 July. Ash was seen in
subsequent satellite images and then later dissipated. The Aviation
Color Code level remained at Orange.

Geologic Summary. The high, isolated massif of Shiveluch volcano (also
spelled Sheveluch) rises above the lowlands NNE of the Kliuchevskaya
volcano group and forms one of Kamchatka's largest and most active
volcanoes. The currently active Molodoy Shiveluch lava-dome complex
was constructed during the Holocene within a large breached caldera
formed by collapse of the massive late-Pleistocene Strary Shiveluch
volcano. At least 60 large eruptions of Shiveluch have occurred during
the Holocene, making it the most vigorous andesitic volcano of the
Kuril-Kamchatka arc. Frequent collapses of lava-dome complexes, most
recently in 1964, have produced large debris avalanches whose deposits
cover much of the floor of the breached caldera. Intermittent
explosive eruptions began in the 1990s from a new lava dome that began
growing in 1980. The largest historical eruptions from Shiveluch
occurred in 1854 and 1964.

Map

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo
Volcanic Ash Advisory Center (VAAC)

Shiveluch Information from the Global Volcanism Program

SUWANOSE-JIMA Ryukyu Islands (Japan) 29.635°N, 129.716°E; summit elev.
799 m

Based on information from JMA, the Tokyo VAAC reported explosions from
Suwanose-jima on 17 and 19 July. Details of possible resulting plumes
were not reported.

Geologic Summary. The 8-km-long, spindle-shaped island of Suwanose-
jima in the northern Ryukyu Islands consists of an andesitic
stratovolcano with two historically active summit craters. Only about
50 persons live on the sparsely populated island. The summit of the
volcano is truncated by a large breached crater extending to the sea
on the east flank that was formed by edifice collapse. Suwanose-jima,
one of Japan's most frequently active volcanoes, was in a state of
intermittent Strombolian activity from On-take, the NE summit crater,
that began in 1949 and lasted nearly a half century. The largest
historical eruption took place in 1813-14, when thick scoria deposits
blanketed residential areas, after which the island was uninhabited
for about 70 years. The SW crater produced lava flows that reached the
western coast in 1813, and lava flows reached the eastern coast of the
island in 1884.

Map

Source: Tokyo Volcanic Ash Advisory Center (VAAC)

Suwanose-jima Information from the Global Volcanism Program

TUNGURAHUA Ecuador 1.467°S, 78.442°W; summit elev. 5023 m

Observations of Tungurahua's summit area during 13-20 July were
sometimes not possible due to inclement weather. On 13 July
incandescent blocks were seen rolling down the flanks at night and
ashfall was reported in areas 8 km SW. Incandescence from the crater
was seen the next night and ashfall was again reported in areas to the
SW. During 15-18 July steam-and-ash plumes were observed and
occasionally drifted SW. Ashfall was noted in areas within 8 km SW, W,
and NW. Lahars descended drainages to the SW, NW, and N on 15 July.
Rolling blocks on the flanks were seen after explosions on 18 July.
During 19-20 July steam plumes drifted NW and W.

Geologic Summary. The steep-sided Tungurahua stratovolcano towers more
than 3 km above its northern base. It sits ~140 km S of Quito,
Ecuador's capital city, and is one of Ecuador's most active volcanoes.
Historical eruptions have all originated from the summit crater. They
have been accompanied by strong explosions and sometimes by
pyroclastic flows and lava flows that reached populated areas at the
volcano's base. The last major eruption took place from 1916 to 1918,
although minor activity continued until 1925. The latest eruption
began in October 1999 and prompted temporary evacuation of the town of
Baños on the N side of the volcano.

Map

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Tungurahua Information from the Global Volcanism Program

Additional Reports of Volcanic Activity by Country

The following websites have frequently updated activity reports on
volcanoes in addition to those that meet the criteria for inclusion in
the Weekly Volcanic Activity Report. The websites are organized by
country and are maintained by various agencies.

Ecuador, Indonesia, Japan, New Zealand, United States and Russia

Sally Kuhn Sennert - Weekly Report Editor
URL: http://www.volcano.si.edu/reports/usgs/

Global Volcanism Program — Department of Mineral Sciences
National Museum of Natural History — Smithsonian Institution