The following constitutes the new activity and unrest 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.
FUEGO Guatemala 14.473°N, 90.880°W; summit elev. 3763 m
INSIVUMEH reported that on 1 June hot lahars traveled SE down Fuego's Las Lajas and El Jute drainages carrying
blocks 2 m in diameter. During 3-5 June explosions produced
ash
plumes that rose 500-1,000 m above the crater and drifted W and S.
Pulses of incandescence from the crater was observed as well as
avalanches on the W flank.
Lava flows traveled 700 m down Taniluyá Canyon drainage and 1 km down Las Lajas. During 4-5 June seismicity increased and the
lava
flow in Las Lajas reached 1.2 km long. Explosions produced ash plumes
that rose 600-800 m above the crater and drifted 7 km SW. Shock waves
were detected up to 7 km away.
Map
GALERAS Colombia 1.22°N, 77.37°W; summit elev. 4276 m
INGEOMINAS reported that on 17 May
ash
emissions originating from an area N and W of the cone within Galeras's
main crater rose 200 m above the crater rim. During 26-27 May ash
plumes rose 800 m above the crater; ashfall was reported in Sandona (13
km NW). Ash emissions occurred on 2 June, and on 5 June plumes rose 1 km
and drifted W. The Alert Level remained at III (Yellow; "changes in the
behavior of volcanic activity").
Map
MANAM Northeast of New Guinea (SW Pacific) 4.080°S, 145.037°E; summit elev. 1807 m
RVO
reported mild activity from Manam's Southern Crater during the first
two weeks of May. Emissions consisted of diffuse white vapor, with
diffuse blue plumes observed during 5-6 and 13-14 May. Gray and
gray-brown
ash
clouds rose from the crater on 7, 9, and 12 May. Incandescence was
visible at night during 6, 8, 10-11, and 13-14 May, and incandescent
tephra was occasionally ejected from the crater.
Activity increased on 16 May, marked by a change in emissions from gray and gray-brown
ash clouds to gray-to-black ash clouds, and an increase in ejected incandescent tephra. On 27 and 30 May
Strombolian activity was observed, and for periods lasting 1-2 hours incandescent
tephra was continuously ejected from the crater. On 30 May two vents in Southern Crater produced
lava
fountains. Rumbling was heard, and ash plumes rose 100-400 m above the
crater and drifted NW. Most of the ejected tephra fell back into the
crater but some was channeled into the SE and SW valleys. Emissions from
Main Crater were milder and mostly characterized by white plumes.
Gray-to-gray-brown ash plumes were noted during 6, 10-11, 13, 26, 28-29,
and 31 May. Fluctuating incandescence was intermittently observed. Ash
fell in the NW part of the island.
Map
NEVADO DEL RUIZ Colombia 4.895°N, 75.322°W; summit elev. 5321 m
According to
INGEOMINAS,
the Observatorio VulcanolĂłgico and SismolĂłgico de Manizales reported
that on 4 June observations of Nevado del Ruiz during an overflight and
through web cameras located in the vicinity of Arenas Crater revealed
that gas-and-ash plumes rose at most 1 km above the crater and drifted W
and NW. The next day seismic signals indicated that
ash
emissions continued. Field observers noted that sulfur dioxide
emissions were significant. Based on analysis of satellite imagery, the
Washington
VAAC reported that an ash plume drifted 40 km W. The VAAC also noted that the Bogota
MWO reported ash emissions drifting NNW at an altitude of 9.1 km (30,000 ft)
a.s.l. The Alert Level remained at II (Orange; "eruption likely within days or weeks").
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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Karymsky, Eastern Kamchatka (Russia)
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Kilauea, Hawaii (USA)
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Popocatépetl, México
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Rabaul, New Britain
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Sakura-jima, Kyushu
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Sangay, Ecuador
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Shiveluch, Central Kamchatka (Russia)
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Tungurahua, Ecuador
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Ulawun, New Britain