Gaia «chunga»

Ambrym (Vanuatu) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

On 24 April the Vanuatu Meteorology and Geo-Hazards Department (VMGD) reported ongoing seismic activity at Ambrym and steam emissions. The lava lakes in Benbow and Marum craters had ceased to be active on 16 December 2018, one day after a fissure eruption began in the ESE part of the summit caldera near the Lewlembwi crater, and continued to be inactive. The Alert Level remained at 2 (on a scale of 0-5); the report reminded the public to stay outside of the Permanent Danger Zone defined as a 1-km radius from Benbow Crater and a 2-km radius from Marum Crater. An additional Danger Zone was defined as a 1-km radius around the December 2018 fissures.

Source: Vanuatu Meteorology and Geo-Hazards Department (VMGD)

Categorías: Gaia «chunga»

Semeru (Indonesia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

Based on analysis of satellite images, the Darwin VAAC reported that on 19 April an ash plume from Semeru rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Stromboli (Italy) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

INGV reported that during 15-21 April activity at Stromboli was characterized by ongoing Strombolian activity and degassing from multiple vents within the crater terrace, though activity intensified on 19 April. Explosions originated at a rate of 3-16 per hour mainly from two vents (N1 and N2) in Area N (north crater area, NCA) and at least four vents (including C, S1, and S2) in Area C-S (South Central crater area). Explosions from the N1 vent ejected lapilli and bombs mixed with ash no more than 150 m high. Low-intensity explosions at the N2 vent ejected tephra to heights under 80 m. Vent C produced gas emissions. Incandescent material from S1 jetted as high as 150 m above the crater. Explosions from two vents at S2 ejected tephra more than 150 m high.

Source: Sezione di Catania - Osservatorio Etneo (INGV)

Categorías: Gaia «chunga»

Asosan (Japan) - Report for 17 April-23 April 2019 - NEW

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

JMA reported that during 17-19 April white plumes from Asosan?s Nakadake Crater rose 1 km above the crater rim. A very small eruption was recorded at 0824 on 19 April, producing a plume that rose 500 m above the crater rim and drifted S. During an overflight that same day scientists observed a pool of hot water on part of the crater floor and a weak volcanic gas odor. According to the Tokyo VAAC a plume rose 500 m and drifted E at 1842. A weak volcanic gas odor was also evident. The Alert Level remained at 2 (on a scale of 1-5).

Sources: Japan Meteorological Agency (JMA) ,Tokyo Volcanic Ash Advisory Center (VAAC)

Categorías: Gaia «chunga»

Klyuchevskoy (Russia) - Report for 17 April-23 April 2019 - NEW

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

KVERT reported that at 0921 and 1155 on 22 April ash plumes from Klyuchevskoy rose to altitudes of 5-5.5 km (16,400-18,000 ft) a.s.l. and drifted 130-140 km E, based on satellite and webcam data. KVERT noted that the ash content in the plumes had significantly increased compared to emissions first observed on 9 April. The Aviation Color Code was raised to Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Categorías: Gaia «chunga»

Fuego (Guatemala) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

INSIVUMEH reported that on 18 April steaming hot lahars descended Fuego?s Ceniza (SSW) and Taniluyá (SW) drainages, carrying variously-sized material including blocks up to 2 m in diameter. The lahars were 1 m deep, 15 m wide, and had a sulfur odor. During 20-23 April there were 17-22 explosions per hour, generating ash plumes that rose almost as high as 1.1 km and drifted 15-20 km S, SW, and W. Shock waves vibrated local structures. Incandescent material was ejected 300-450 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, 600 m long, advanced in the Seca drainage. Ashfall was reported in reported in Yepocapa (8 km N), Morelia (9 km SW), Santa Sofia (12 km SW), Sangre de Cristo (8 km WSW), and Panimache (8 km SW).

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

Categorías: Gaia «chunga»

Ibu (Indonesia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

The Darwin VAAC reported that on 18 April an ash plume from Ibu was identified in satellite images drifting E at an altitude of 2.1 km (7,000 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.

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

Categorías: Gaia «chunga»

Krakatau (Indonesia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

PVMBG reported that there were four eruptive events during 15-22 April and multiple events on 23 April recorded by Anak Krakatau?s seismic network, though no emissions were visible. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 2-km radius hazard zone from the crater.

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

Categorías: Gaia «chunga»

Tengger Caldera (Indonesia) - Report for 17 April-23 April 2019 - NEW

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

The Darwin VAAC reported that on 17 April ash plumes from Tengger Caldera?s Bromo cone rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted W, based on webcam images and satellite data. On 21 April BNPB stated that ash emissions had been observed almost daily, and that tremor was recorded continuously. 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.

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

Categorías: Gaia «chunga»

Karymsky (Russia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

KVERT reported that a weak thermal anomaly over Karymsky was visible in satellite images during 13-14 April. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Categorías: Gaia «chunga»

Agung (Indonesia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

PVMBG reported two explosive eruptions at Agung on 21 April. The first was recorded at 0321 and produced a dense gray ash plume that rose 2 km above the crater rim and drifted W and S. Ashfall was reported in areas downwind including Besakih (7 km SW), Rendang (12 km NW), Klungkung (~40 km S), Gianyar (20 km WSW), Bangli (17 km WNW), Tabanan (51 km WSW), and the International Gusti Ngurah Rai (IGNR) airport (60 km SW) in Denpasar. The second event was recorded at 1856 and generated a dense ash plume that rose 3 km and drifted S. Minor ashfall was reported in Besakih, Rendang, Sebudi (6 km SW), and Selat (12 km SSW). The eruptions were accompanied by a boom heard at both the Rendang and Batulompeh observation posts. Ejected incandescent material from the two events fell on the flanks in all directions within a radius of 4 km. 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)

Categorías: Gaia «chunga»

Merapi (Indonesia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

PVMBG reported that during 15-21 April the lava dome at Merapi continued to grow slowly, with any extruded material channeled into the SE-flank Gendol River drainage. White emissions rose 70 m. Block-and-ash flows traveled as far as 1.5 km in the Gendol drainage on 21 April. 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)

Categorías: Gaia «chunga»

Aira (Japan) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

JMA reported that the sulfur dioxide emission rate at Minamidake crater (at Aira Caldera?s Sakurajima volcano) was somewhat high on 16 April at 1,600 tons/day. An explosion on 17 April generated a plume that rose 2 km above the crater rim and ejected material as far as 900 m. During 19-22 April plumes from two events rose as high as 1.4 km. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Categorías: Gaia «chunga»

Dukono (Indonesia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

Based on satellite and wind model data, the Darwin VAAC reported that during 17-23 April ash plumes from Dukono rose as high as 2.1 km (7,000 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.

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

Categorías: Gaia «chunga»

Ebeko (Russia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 12-15 April that sent ash plumes up to 3.2 km (10,500 ft) a.s.l. A thermal anomaly was identified in satellite images on 13 April. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Categorías: Gaia «chunga»

Sheveluch (Russia) - Report for 17 April-23 April 2019

Actividad volcánica (SI/USGS) - Mié, 2019/04/24 - 09:12

KVERT reported that a thermal anomaly over Sheveluch?s lava dome was identified daily in satellite images during 12-18 April. Ash plumes were visible on 13 and 15 April drifting 83 km SE. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Categorías: Gaia «chunga»

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

Actividad volcánica (SI/USGS) - Mié, 2019/04/17 - 07:49

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)

Categorías: Gaia «chunga»

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

Actividad volcánica (SI/USGS) - Mié, 2019/04/17 - 07:49

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

Categorías: Gaia «chunga»

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

Actividad volcánica (SI/USGS) - Mié, 2019/04/17 - 07:49

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)

Categorías: Gaia «chunga»

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

Actividad volcánica (SI/USGS) - Mié, 2019/04/17 - 07:49

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)

Categorías: Gaia «chunga»
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