The following constitutes the new activity/unrest and ongoing activity report from the
Weekly Volcanic Activity Report, a cooperative project between the Smithsonian's
Global Volcanism Program and the US Geological Survey's
Volcano Hazards Program.
NEW ACTIVITY/UNREST
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| Fuego volcano. |
FUEGO Guatemala 14.473°N, 90.880°W; summit elev. 3763 m
On 19 May seismicity at Fuego increased and explosions were heard at 5-10 minute intervals. A 600-m-long
lava
flow descended the W flank, and a 1-km-long and 20-m-wide lava flow
descended the E flank, reaching the base of the volcano. Explosions
ejected incandescent
tephra 400 m above the crater, and produced
ash plumes that rose 5 km above the crater and drifted 30 km S and SW. Coordinadora Nacional para la Reducción de Desastres (
CONRED)
raised the Alert Level to Orange (the second highest level on a 4-color
scale). Pyroclastic flows also descended the flanks, prompting
authorities to restrict passage on part of a highway. Ash plumes from
the
pyroclastic flows
rose 3 km above the crater. Ashfall was reported in Morelia (7 km SW),
Panimaché I and II (9 km SW), Sangre de Cristo (8 km WSW), and Yepocapa
(8 km WNW). Thirteen people from El Porvenir in Alotenango (8 km ENE)
evacuated to local shelters. Visual observations and seismicity
indicated that activity decreased later that day. On 20 May a few explosions generated
ash
plumes that rose 500 m above the crater and drifted 8 km SW. The next
day cloud cover prevented observations; however explosions, rumbling,
and degassing sounds were reported. On 22 May explosions generated ash
plumes that rose as high as 1 km and drifted 10 km S and SE. Rumbling
was heard and shock waves were detected. The
lava flows were inactive and only incandescence from
block avalanches was observed.
Map
MARAPI Sumatra (Indonesia) 0.381°S, 100.473°E; summit elev. 2891 m
According to a news article, an approximately 10-minute-long eruption from Marapi produced an
ash plume that rose 600 m on 18 May. The article noted that the Alert Level remained at 2 (on a scale of 1-4).
Map
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 and 20-21 May
ash plumes from Batu Tara rose to altitudes of 2.4-3 km (8,000-10,000 ft)
a.s.l. and drifted 27-55 km N and NW.
Map
CLEVELAND Chuginadak Island 52.825°N, 169.944°W; summit elev. 1730 m
AVO reported that during 16-22 May satellite observations of Cleveland's summit crater revealed nothing unusual; no
ash emissions or other signs of unrest were detected or reported. The
Volcano Alert Level remained at Watch and the
Aviation Color Code remained at Orange.
Map
DUKONO Halmahera 1.68°N, 127.88°E; summit elev. 1335 m
Based on analyses of satellite imagery, the Darwin
VAAC reported that on 18 May an
ash plume from Dukono rose to an altitude of 3 km (10,000 ft)
a.s.l. and drifted 55 km E.
Map
KARYMSKY Eastern Kamchatka (Russia) 54.05°N, 159.45°E; summit elev. 1536 m
KVERT reported that moderate seismic activity from Karymsky continued to be detected during 11-18 May, and indicated that possible
ash plumes rose to an altitude of 1.8 km (6,000 ft)
a.s.l. on 10 and 14 May. Satellite imagery showed a thermal anomaly on the volcano during 10-13 and 16 May. The
Aviation Color Code remained at Orange.
Map
KILAUEA Hawaii (USA) 19.421°N, 155.287°W; summit elev. 1222 m
During 16-22 May
HVO reported that the circulating and spattering
lava
lake periodically rose and fell in the deep pit within Kilauea's
Halema'uma'u Crater, and spilled over the deep inner ledge on multiple
occasions. On 15 May laser measurements indicated that the lava-lake
surface was about 65 m below the Halema'uma'u Crater floor, among the
highest levels measured; the lake rose five more meters during 18-19
May. Almost daily measurements indicated that the gas plume from the
vent continued to deposit variable amounts of ash, and occasionally fresh
spatter
from the margins of the lava lake, onto nearby areas. A lava pond in a
small pit on the E edge of Pu'u 'O'o crater floor remained active with
spattering. On 19 May a small collapse of the N rim of the pit slightly
enlarged the pit and lava pond within. A small lava flow erupted from a
vent on the S part of the floor.
Lava flows were active on the pali and the coastal plain, and were about 750 m from the sea.
Map
POPOCATEPETL México 19.023°N, 98.622°W; summit elev. 5426 m
CENAPRED
reported that, although cloud cover often prevented observations of
Popocatépetl during 16-22 May, multiple gas-and-ash plumes were observed
daily rising as high as 1.5 km above crater. Plumes drifted NW, NE, SE,
and SW. Incandescent fragments ejected from the crater landed on the
flanks as far as 800 m away. Seismicity remained high. The Alert Level
remained at Yellow Phase Three.
Map
SAKURA-JIMA Kyushu 31.585°N, 130.657°E; summit elev. 1117 m
Based on information from
JMA, the Tokyo
VAAC
reported that during 16-20 and 22 May explosions from Sakura-jima
produced plumes that rose to altitudes of 1.8-3.7 km (6,000-12,000 ft)
a.s.l. and drifted multiple directions. Pilots observed
ash
plumes during 16-17 May that rose to altitudes of 2.7-4 km
(9,000-13,000 ft) a.s.l. and drifted E and SE. Explosions were detected
during 21-22 May.
JMA reported that during 18-21 May explosive eruptions from Showa Crater occurred multiple times and ejected
tephra
as far as 1.8 km from the crater. Incandescence from the crater was
observed at night. Very small eruptions from Minami-dake Crater occurred
on 18 and 19 May, and a small
pyroclastic flow traveled 300 m down the Showa crater flanks on 21 May.
Map
SANTA MARIA Guatemala 14.756°N, 91.552°W; summit elev. 3772 m
INSIVUMEH reported that on 21 May a
lahar traveled down Santa MarÃa's Rio Nima II drainage, carrying tree branches and 40-cm-wide
lava blocks. On 22 May explosions produced
ash
plumes that rose 900 m above Caliente dome and drifted 10 km SE.
Ashfall was reported in San Felipe (15 km SSW), El Nuevo Palmar (12 km
SSW), and areas on the E flank.
Map
SHIVELUCH Central Kamchatka (Russia) 56.653°N, 161.360°E; summit elev. 3283 m
KVERT
reported that explosive activity at Shiveluch continued during 11-18
May. Ground-based observers and satellite imagery indicated that a
viscous
lava flow continued to effuse in the active crater, and was accompanied by
fumarolic activity and
lava-dome
incandescence. Satellite imagery during 10-12 and 15-16 May showed a
thermal anomaly on the lava dome. On 12 May observers reported that
ash plumes rose to an altitude of 8 km (26,200 ft)
a.s.l. and satellite imagery showed an ash plume drifting more than 800 km E.
Based on information from
KVERT and analyses of satellite images, the Tokyo
VAAC reported that on 20 May an
ash plume rose to an altitude of 9.1 km (30,000 ft)
a.s.l. and drifted SW. Images the next day showed that the ash had dissipated.
Map
TUNGURAHUA Ecuador 1.467°S, 78.442°W; summit elev. 5023 m
IG reported that during 16-22 May visual observations of
Tungurahua were often limited due to cloud cover. On 16 May a
steam-and-gas plume drifted W and lahars descended the W flank. On 18
May ashfall was reported in Manzano (8 km SW), Choglontus (SW),
Chontapamba (W), Yuibug, Puela (8 km SW), and high in the Mapayacu
drainage (SW). Roaring was heard on 22 May, and slight ashfall was
reported in Manzano.
Map
For the complete list of ongoing volcanic activity and additional geological summary, click
HERE or select the specific volcano name below for additional details:
ONGOING ACTIVITY: Batu Tara, Komba Island (Indonesia)
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Cleveland, Chuginadak Island
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Dukono, Halmahera
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Karymsky, Eastern Kamchatka (Russia)
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Kilauea, Hawaii (USA)
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Popocatépetl, México
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Sakura-jima, Kyushu
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Santa MarÃa, Guatemala
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Shiveluch, Central Kamchatka (Russia)
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Tungurahua, Ecuador