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: 15 min 1 sec ago

Asosan (Japan) - Report for 10 April-16 April 2019 - NEW

Tue, 04/16/2019 - 10:49pm

JMA reported an increase in the amplitude of volcanic tremor at Asosan on 14 April, increasing the possibility of an eruption at Nakadake Crater. The Alert Level was raised to 2 (on a scale of 1-5). Tremor amplitude further increased on 15 April. A very small eruption was recorded at 1828 on 16 April, producing a plume that rose 200 m above the crater rim and drifted NW.

Source: Japan Meteorological Agency (JMA)

Tengger Caldera (Indonesia) - Report for 10 April-16 April 2019 - NEW

Tue, 04/16/2019 - 10:49pm

The Darwin VAAC reported that during 10-11 and 15-16 April ash plumes from Tengger Caldera?s Bromo cone rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted in multiple directions, based on webcam images and satellite data. The Alert Level remained at 2 (on a scale of 1-4), and visitors were warned to stay outside of a 1-km radius of the crater.

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

Villarrica (Chile) - Report for 10 April-16 April 2019 - NEW

Tue, 04/16/2019 - 10:49pm

POVI reported that during 14-15 April lava fountains at Villarrica were visible rising as high as 70 m above the crater rim. Seismicity was low.

Source: Proyecto Observación Villarrica Internet (POVI)

Agung (Indonesia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

PVMBG reported that at 1847 on 11 April an explosion at Agung produced a dense gray ash plume that rose 2 km above the crater rim and drifted W. The Alert Level remained at 3 (on a scale of 1-4) with the exclusion zone set at a 4-km radius.

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

Aira (Japan) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

JMA reported that incandescence from Minamidake crater (at Aira Caldera?s Sakurajima volcano) was occasionally visible during 12-15 April. Two events and one explosion generated plumes that rose a maximum of 2.2 km above the crater rim and ejected material as far as 700 m. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Dukono (Indonesia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

Based on satellite and wind model data, the Darwin VAAC reported that during 10-12 and 15-16 April ash plumes from Dukono rose as high as 2.4 km (8,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and visitors were warned to remain outside of the 2-km exclusion zone.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Ebeko (Russia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions on 9 April that sent ash plumes up to 2.2 km (7,200 ft) a.s.l. Weather clouds obscured views on the other days during 5-12 April. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Etna (Italy) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

INGV reported that during 8-14 April gas emissions of variable intensity rose from Etna?s summit craters. During each night webcams recorded pulsating flashes from the E vent in New Southeast Crater (NSEC) which became more intense towards the end of the week. A minor ash emission from Bocca Nuova Crater was visible at 0520 on 8 April.

Source: Sezione di Catania - Osservatorio Etneo (INGV)

Fuego (Guatemala) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

INSIVUMEH reported that during 10-11 April steaming lahars descended Fuego?s Las Lajas (SE), El Jute (SE), Ceniza (SSW), and Taniluyá (SW) drainages, carrying blocks up to 3 m in diameter, and branches and tree trunks. On 11 April lahars were 3 m deep and 20 m wide. During 11-15 April there were 12-22 explosions per hour, generating ash plumes that rose almost 1.1 km and drifted10-15 km N, NE, E, and W. Minor ashfall was reported in areas downwind including Alotenango, Ciudad Vieja (13.5 km NE), La Réunion, Yepocapa (8 km N), Morelia (9 km SW), Santa Sofia (12 km SW), and Panimache (8 km SW). Shock waves sometimes vibrated residential structures. Incandescent material was ejected 100-300 m high and caused avalanches of material that occasionally traveled long distances down Seca, Taniluyá, Ceniza, Trinidad, Las Lajas, and Honda ravines. A lava flow, 400-500 m long, advanced in the Seca drainage.

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

Ibu (Indonesia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

The Darwin VAAC reported that on 10 April ash plumes from Ibu were identified in satellite images drifting N at an altitude of 2.1 km (7,000 ft) a.s.l. During 15-16 April ash plumes drifted N and NE at an altitude of 2.4 km (8,000 ft) a.s.l. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Kadovar (Papua New Guinea) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

Based on satellite data and wind model data, the Darwin VAAC reported that on 10 April an ash plume from Kadovar rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted SE and E.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Karangetang (Indonesia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 16 April an ash emission from Karangetang rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted W. The Alert Level remained at 2 (on a scale of 1-4).

Sources: Darwin Volcanic Ash Advisory Centre (VAAC),Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Kerinci (Indonesia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

PVMBG reported that at 1559 on 13 April and 0629 on 14 April brownish ash plumes rose 400 m above Kerinci?s crater rim and drifted E and NE, respectively, as noted by a ground-based observer. The Alert Level remained at 2 (on a scale of 1-4), and tourists were warned to remain outside of the 3-km exclusion zone.

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

Krakatau (Indonesia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

PVMBG reported that an eruption at Anak Krakatau was recorded by the seismic network at 0932 on14 April. An ash plume drifted NE. An event was recorded at 2358 on 15 April, though no ash plume was visible. The Alert Level remained at 3 (on a scale of 1-4), and residents were warned to remain outside of the 5-km radius hazard zone from the crater.

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

Merapi (Indonesia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

PVMBG reported that during 5-11 April the lava dome at Merapi continued to grow slowly, with extruded material channeled into the SE-flank Gendol River drainage. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 3-km exclusion zone.

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

Rincon de la Vieja (Costa Rica) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

OVSICORI-UNA reported that an eruption at Rincón de la Vieja recorded at 0617 on 10 April produced a gas-and-steam plume that rose 1 km above the crater rim and drifted SE. At 0643 on 12 April a plume rose 500 m. Another event was detected at 0700 on 13 April, although poor weather conditions prevented visual observations. On 14 April OVSICORI-UNA noted that aerial photographs taken during an overflight showed a milky-gray acid lake at a relatively low water level with convection cells of several tens meters of diameter in the center and Eastern parts of the lake.

Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)

Ruapehu (New Zealand) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

GeoNet reported that, at least for the last 10 years of continuous lake-temperature monitoring, heating cycles at Ruapehu?s summit Crater Lake have occurred over periods of about 12 months with temperatures ranging from 15 to 45 degrees Celsius. However, the temperature remained elevated at 30 degrees for a period of six months starting in September 2018. GeoNet noted that during the previous two weeks the lake temperature increased further, at a rate of around a half of a degree per day, to 42 degrees on 9 April. Tremor levels also increased. The Volcanic Alert Level remained at 1 (minor volcanic unrest) and the Aviation Color Code remained at Green.

Source: GeoNet

Sheveluch (Russia) - Report for 10 April-16 April 2019

Tue, 04/16/2019 - 10:49pm

KVERT reported that a thermal anomaly over Sheveluch?s lava dome was identified daily in satellite images during 6-12 April. Explosions on 10 April generated ash plumes that rose to 8-9 km (26,200-29,500 ft) a.s.l. and drifted about 1,300 km SSE. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)