Gaia «chunga»

Lateiki (Tonga) - Report for 9 October-15 October 2019 - NEW

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

According to news articles the Tonga Geological Services Office of the Ministry of Lands and Natural Resources stated that several observations indicating a possible eruption at Metis Shoal, also known as Lateiki, were reported during 13-15 October. Real Tonga pilots flying between Tongatapu and Vava'u observed the intermittent plumes rising to 4.6-5.2 km (15,000-17,000 ft) a.s.l. and drifting N on 15 October. Ash in the plumes was not identifiable according to the Wellington VAAC.

Sources: Matangi Tonga Online ,Matangi Tonga Online ,Wellington Volcanic Ash Advisory Center (VAAC)

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Ambrym (Vanuatu) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

Vanuatu Meteorology and Geo-Hazards Department (VMGD) reported that data and observations during February-October indicated that conditions at Ambrym had become stable after the eruption in December 2018 that focused on the summit caldera and East Rift Zone. On 10 October the Alert Level was lowered to 1 (on a scale of 0-5) indicating minor unrest. VMGD warned 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, and additionally to stay away from the ground cracks resulting from the December 2019 eruption (a 500-m-radius around the major cracks at Paamal village).

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

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Reventador (Ecuador) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

IG reported that during 8-15 October seismic data from Reventador?s network indicated a high level of seismic activity, including explosions, long-period earthquakes, harmonic tremor, and signals indicating emissions. Weather often prevented views of the summit area, although during clear conditions ash-and-steam plumes were visible rising sometimes higher than 1 km above the crater rim and drifting NW, W, and SW. Crater incandescence was periodically observed at night. Blocks were observed rolling down the flanks on 10 and 14 October.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

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Semeru (Indonesia) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

The Darwin VAAC reported that during 13-14 September ash plumes from Semeru rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted SW based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4).

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

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Ibu (Indonesia) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

PVMBG reported that at 0707 on 15 October an ash plume from Ibu rose at least 400 m above the summit and drifted S. 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: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

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Sabancaya (Peru) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

Instituto Geofísico del Perú (IGP) reported that an average of 36 low-to-medium intensity explosions per day occurred at Sabancaya during 7-13 October. Gas-and-ash plumes rose as high as 3.5 km above the summit and drifted SE and SW. There were 15 thermal anomalies identified in satellite data. The Alert Level remained at Orange (the second highest level on a four-color scale) and the public were warned to stay outside of a 12-km radius.

Source: Instituto Geofísico del Perú (IGP)

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Krakatau (Indonesia) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

PVMBG reported that at 1010 and 1226 on 12 October, 1026 on 13 October, and 1228 on 14 October the webcam at Anak Krakatau recorded dense gray-black ash plumes rising about 200 m above the bottom of the crater and drifting N. The 14 October event was recorded by the seismic network for three minutes. The Alert Level remained at 2 (on a scale of 1-4), and the public was 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)

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Karangetang (Indonesia) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

PVMBG reported that during 7-15 October lava continued to effuse from Karangetang?s Main Crater (S), traveling as far as 1.5 km down the Nanitu, Pangi, and Sense drainages on the SW and W flanks. Sometimes dense white plumes rose to 400 m above the summit. The Alert Level remained at 2 (on a scale of 1-4).

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

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Asosan (Japan) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

JMA reported that during 7-15 October ash plumes rose as high as 1.3 km above Asosan?s summit crater rim, causing ashfall in areas downwind including periodically at the Kumamoto Regional Meteorological Observatory. Crater incandescence was occasionally visible at night. The sulfur dioxide emission rate was very high at 4,000 tons per day on 11 October. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

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Aira (Japan) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

JMA reported that incandescence from Minamidake crater (at Aira Caldera?s Sakurajima volcano) was occasionally visible at night during 7-15 October. There were 13 explosions detected by the seismic network and nine non-explosive eruptive events. Eruption plumes rose 2.3-2.7 km above the crater rim and large blocks were ejected as far as 1.7 km away. The sulfur dioxide emission rate was high, at 2,100 tons/day, on 11 October. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

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Dukono (Indonesia) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

Based on satellite and wind model data, and information from PVMBG, the Darwin VAAC reported that during 9-15 October ash plumes from Dukono rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was 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)

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Ebeko (Russia) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

KVERT reported that ash from Ebeko was reported in Severo-Kurilsk (Paramushir Island), about 7 km E, during 4-5 October. Volcanologists in Severo-Kurilsk observed explosions during 7-8 and 10 October that sent ash plumes up to 2.5 km (8,200 ft) a.s.l. and drifted E and NE. A weak thermal anomaly was identified in satellite images on 8 October. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

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Merapi (Indonesia) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

PVMBG reported that the lava dome at Merapi slowly grew during 3-10 October and was an estimated 468,000 cubic meters, based on 19 September drone photos. At 1631 on 14 October an eruptive event was recorded by the seismic network for four minutes and 30 seconds. A plume rose 3 km above the summit and drifted SW, causing ashfall 30 minutes after the eruption until 1900 in areas as far as 25 km W. A pyroclastic flow traveled down the SW flank. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone.

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

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Sheveluch (Russia) - Report for 9 October-15 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/16 - 07:14

KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 4-11 October. Explosions seen in video and satellite images on 6 and 9 October produced ash plumes that rose 6.5-11 km (21,300-36,100 ft) a.s.l. and drifted 1,100 km E. Resuspended ash drifted 170 km E on 4 and 8 October. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

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Fuego (Guatemala) - Report for 2 October-8 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/09 - 07:53

INSIVUMEH reported that there were 10-18 explosions per hour recorded at Fuego during 2-8 October, generating ash plumes that rose as high as 1.1 km above the crater rim and drifted 10-25 km S, SW, W, and NW. Ashfall was reported in several areas downwind including Santa Sofía (12 km SW), Morelia (9 km SW), Panimaché I and II (8 km SW), Finca Palo Verde, San Pedro Yepocapa (8 km NW), and El Porvenir (8 km ENE). Explosions sometimes produced shock waves that rattled houses in nearby communities. Incandescent material was ejected 200-400 m high and caused avalanches of material that occasionally traveled long distances (reaching vegetated areas) down the Seca (W), Taniluyá (SW), Ceniza (SSW), Trinidad (S), El Jute (SE), Las Lajas (SE), and Honda ravines. Lava flows traveled 200 m down the Seca drainage on 6 October and were active in the Santa Teresa (W) drainage on 8 October. Lahars descended the Ceniza, El Mineral, and Seca drainages during 3-7 October, carrying tree branches, trunks, and blocks 1-3 m in diameter.

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

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Hakoneyama (Japan) - Report for 2 October-8 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/09 - 07:53

On 7 October JMA lowered the Alert Level for Hakoneyama to 1 (the lowest level on a 5-level scale), noting that the number of volcanic earthquakes had decreased to background levels after a spike in seismicity was recorded in May. Inflation had been detected but had become almost stagnant after late August. Fumaroles in the Owakudani hot springs area continued to be active, with gas-and-steam plumes rising 100-400 m above their vents.

Source: Japan Meteorological Agency (JMA)

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Kerinci (Indonesia) - Report for 2 October-8 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/09 - 07:53

PVMBG reported that at 1253 on 6 October a brown ash emission from Kerinci rose around 600 m above the summit and drifted WSW according to a ground observer. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 3-km exclusion zone.

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

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Nevado del Ruiz (Colombia) - Report for 2 October-8 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/09 - 07:53

Servicio Geológico Colombiano?s (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that during 24 September-1 October seismicity at Nevado del Ruiz increased in both frequency and magnitude compared to the previous week. Steam-and-gas plumes rose as high as 1.4 km above the summit and drifted mainly NW. A tremor pulse recorded at 2353 on 29 September was associated with an ash plume that drifted NW and was observed by Parque Nacional Natural los Nevados (PNNN) officials, SGC staff in the field, and residents of Manizales (25 km NW). Seismicity continued to indicate gas-and-ash emissions during 1-4 October. Beginning at 0138 on 4 October seismicity increased; several ash emissions were visible during the morning in webcam images and by SGC staff in the field. The emissions rose as high has 800 m and drifted mainly NW, causing ashfall locally and in Manizales. The Alert Level remained at 3 (Yellow; the second lowest level on a four-color scale).

Source: Servicio Geológico Colombiano (SGC)

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Santa Maria (Guatemala) - Report for 2 October-8 October 2019

Actividad volcánica (SI/USGS) - Mié, 2019/10/09 - 07:53

INSIVUMEH reported that each day during 2-8 October there were as many as five explosions per hour detected at Santa María's Santiaguito lava-dome complex. Ash plumes rose 700-900 m above the complex and drifted SW. Avalanches of material descended the SE and S flanks. Ash fell in Monte Claro (S) on 2 October.

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

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Ulawun (Papua New Guinea) - Report for 2 October-8 October 2019 - NEW

Actividad volcánica (SI/USGS) - Mié, 2019/10/09 - 07:53

RVO reported that the fissure eruption on Ulawun?s WSW flank had ceased by 4 October, producing only diffuse white-to-gray steam plumes with a blueish tinge from the main coalesced vent. Weak incandescence from the vent was visible at night on 5 October. The lava-flow rate slowed to 3-5 m a day, likely because it was no longer being fed. RSAM decreased to 1,000 units; regular small high-frequency events were recorded during 4-7 October. RVO recommended that the Alert Level be reduced to Stage 2.

Source: Rabaul Volcano Observatory (RVO)

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