OREGON STATE UNIVERSITY

GVP Eruption Reports

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The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday, these notices are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of eruptions during the week, but rather a summary of activity that meet selected criteria. Carefully reviewed, detailed reports are published monthly in the Bulletin of the Global Volcanism Network. The World Organization of Volcano Observatories (WOVO) website (http://www.wovo.org/) lists the regional volcano observatories that have the most authoritative data for many of these events.
Updated: 2 weeks 3 days ago

Cereme (Indonesia) - Report for 24 June-30 June 2015 - NEW

Tue, 06/30/2015 - 11:37pm

According to the Darwin VAAC a pilot observed a small "smoke" plume rising from Cereme on 24 June; ash was not identified in satellite images.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Cleveland (United States) - Report for 24 June-30 June 2015 - NEW

Tue, 06/30/2015 - 11:37pm

AVO reported that no significant activity was detected at Cleveland in seismic or infrasound data during 24-30 June. Elevated surface temperatures were detected during 28-30 June, and webcam images from 29 June showed fresh ash deposits at the summit. The Aviation Color Code remained at Yellow and the Volcano Alert Level remained at Advisory.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Colo (Indonesia) - Report for 24 June-30 June 2015 - NEW

Tue, 06/30/2015 - 11:37pm

PVMBG reports that seismicity significantly increased on 8 June, particularly volcanic and shallow-volcanic earthquakes; 12 volcanic earthquakes were recorded on 22 June (previously, 1-5 events per day had been recorded), and there were 11 shallow volcanic earthquakes on 23 June (previously, 1-8 events per day had been recorded). On 24 June the Alert Level was raised to 2 (on a scale of 1-4). However, observers at the Colo Volcano Observation Post in the Wakai village did not see plumes during April-23 June. Residents and tourists were warned not to approach the volcano within a radius of 1.5 km.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Concepcion (Nicaragua) - Report for 24 June-30 June 2015 - NEW

Tue, 06/30/2015 - 11:37pm

INETER reported that gas explosions continued to be detected at Concepción; by 30 June a total of 2,417 explosions, 113 since 23 June, had been detected by the network since activity increased (date not specified).

Source: Instituto Nicaragüense de Estudios Territoriales (INETER)

Hakoneyama (Japan) - Report for 24 June-30 June 2015 - NEW

Tue, 06/30/2015 - 11:37pm

JMA reported that on 29 June scientists visiting Hakoneyama observed new fumaroles in a landslide-prone area, appearing after a possible landslide had occurred. Fresh sediment deposits within 2 km were possibly caused by the formation of the fumaroles. Seismicity began increasing at 1930, and a 5-minute-period of volcanic tremor began at 1932. At 1230 on 30 June a small-scale eruption occurred. The Alert Level was raised to 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Raung (Indonesia) - Report for 24 June-30 June 2015 - NEW

Tue, 06/30/2015 - 11:37pm

PVMBG reported that, during times of clear weather during 1-28 June, white plumes were observed rising as high as 300 m above Raung's crater rim. Rumbling was frequently heard at the observation post. Seismic tremor sharply increased on 21 June, and crater incandescence was observed on 25 and 28 June. BNPB reported that increased activity on 28 June was characterized by Strombolian activity, roaring, ash plumes that rose 300 m, and a loud thumping sound heard 20 km away at 2000. Incandescence from the crater was clearly visible from the observation post in Banyuwangi. PVMBG raised the Alert Level to 3 (on a scale of 1-4) on 29 June, and reminded the public not to approach the crater within a 3-km radius.

Sources: Badan Nacional Penanggulangan Bencana (BNPB) ,Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Sinabung (Indonesia) - Report for 24 June-30 June 2015 - NEW

Tue, 06/30/2015 - 11:37pm

PVMBG reported that foggy weather sometimes prevented visual observations of Sinabung during 22-29 June. White plumes rose as high as 500 m above the crater, and lava flows on the flanks were incandescent as far as 3 km S and SE. Multiple pyroclastic flows per day during 22-26 and 28 June traveled 2.5-4 km down the flanks from the SSE to the SE. One pyroclastic flow was observed on 27 June. Ash plumes rose generally 3.5 km on most days, drifting E, SE, and S, although an ash plume rose as high as 5 km on 25 June. Seismicity consisted of avalanche signals, low-frequency and hybrid events, tremor, tectonic events, and volcanic earthquakes; RSAM values increased due to an increase of avalanche signals. Deformation data showed a trend of inflation. The Alert Level remained at 4 (on a scale of 1-4), indicating that people within 7 km of the volcano on the SSE sector, and within 6 km in the ESE sector, should evacuate.

Sources: Badan Nacional Penanggulangan Bencana (BNPB) ,Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Karangetang (Indonesia) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

PVMBG reported that on 18 June a lahar in Karangetang’s Batuawang drainage (E) was 25 cm thick, carried boulders, and covered a 100-m section of roadway. The lahar also damaged or destroyed four homes. Based on observations conducted at the Karangetang Volcano Observation Post in the village of Salili, white plumes rose as high as 150 m above the main crater and 25 m above Crater II during 22-29 June. Incandescence from the lava dome was observed at night. Lava flowed from the S part of the dome; incandescent avalanches from the front the lava flow traveled as far as 2.3 km towards Batuawang and Kahetang drainages (E). Seismicity was dominated by signals characteristic of avalanches, and indicated that activity continued to be high. The Alert Level remained at 3 (on a scale of 1-4); visitors and residents were warned not to approach Karangetang within a 4-km radius.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Nishinoshima (Japan) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

According to NASA's Earth Observatory, a satellite image of Nishinoshima acquired on 21 June showed a sulfur dioxide-and-steam plume rising from the 2.45-square-kilometer island and drifting NE. Hot spots from lava that had emerged from lava tubes were visible on a lava delta at the SE part of the island.

Source: NASA Earth Observatory

Fuego (Guatemala) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

In a special report from 28 June at 2100, INSIVUMEH reported that activity at Fuego had been changing during the previous few hours, characterized by 4-5 explosions per hour and ash plumes rising 850 m. During 28-30 June ash plumes drifted W, causing ashfall in areas downwind. Shock waves from the explosions vibrated structures in areas including Panimache and Panimache II (8 km SW), Morelia (9 km SW), Santa Sofía (12 km SW), and Sangre de Cristo (8 km WSW). Block avalanches descended the flanks. Rumbling was audible as far as 25 km away. During 29-30 June a 300-m-long lava flow was visible in the Las Lajas drainage on the SE flank.

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

Ubinas (Peru) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

Instituto Geofísico del Perú (IGP) Observatorio Volcanológico del Sur (OVS) reported that during 23-29 June seismic tremor at Ubinas, often associated with emissions, slightly increased compared to the previous week. Ash-and-gas plumes rose as high as 3 km above the crater base, drifting in multiple directions, and four explosions were detected during 24-27 June.

Source: Instituto Geofísico del Perú (IGP)

Colima (Mexico) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

The Washington VAAC reported that an ash-and-gas plume from an explosion at Colima was recorded by the webcam on 24 June; weather clouds prevented views of the volcano.

Source: Washington Volcanic Ash Advisory Center (VAAC)

Manam (Papua New Guinea) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

Based on observations of satellite imagery and wind data analyses, the Darwin VAAC reported that during 28-30 June ash plumes from Manam rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. and drifted as far as 75 km NE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Karymsky (Russia) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

KVERT reported that explosive activity at Karymsky likely continued during 19-26 June; weather clouds obscured views of the volcano. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Shishaldin (United States) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

AVO reported that seismicity at Shishaldin continued to be elevated over background levels 24-30 June, indicating that low-level eruptive activity confined to the summit crater likely continued. Elevated surface temperatures were periodically detected in satellite images. Webcam images showed ash deposits around the summit crater rim on 29 and 30 June. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Zhupanovsky (Russia) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

KVERT reported that explosive activity at Zhupanovsky probably continued during 19-26 June; weather clouds obscured views of the volcano. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Dukono (Indonesia) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 27-28 June ash plumes from Dukono rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted 55-75 km NE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Aira (Japan) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

JMA reported 26 explosions during 22-29 June from Showa Crater at Aira Caldera’s Sakurajima volcano, some that ejected tephra as far as 1,300 m, and incandescence from the crater that was visible during 22-23 and 27 June. A small-scale eruption occurred from Minami-Dake Crater on 22 June. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Kilauea (United States) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

HVO reported that seismicity beneath Kilauea's summit and upper East Rift Zone was at background levels during 24-30 June. The lava lake continued to be active in the deep pit within the Overlook vent, exhibiting vigorous spattering. The June 27th NE-trending lava flow continued to be active with surface flows within 8 km NE of Pu'u 'O'o.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Sheveluch (Russia) - Report for 24 June-30 June 2015

Tue, 06/30/2015 - 11:37pm

KVERT reported that during 19-26 June lava-dome extrusion onto Sheveluch’s N flank was accompanied by fumarolic activity. Satellite images showed a thermal anomaly over the volcano during 23-24 June; weather clouds obscured the volcano on the other days. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)