Actividad volcánica (SI/USGS)

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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.
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Great Sitkin (United States) - Report for 10 July-16 July 2019 - NEW

Mié, 2019/07/17 - 09:08

On 15 July AVO reported that seismicity at Great Sitkin had decreased to background levels during the past few weeks with no evidence of eruptive activity in geophysical or satellite data. The Aviation Color Code was lowered to Green and the Volcano Alert Level was lowered to Normal.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Categorías: Gaia «chunga»

Shishaldin (United States) - Report for 10 July-16 July 2019 - NEW

Mié, 2019/07/17 - 09:08

AVO increased the Aviation Color Code for Shishaldin to Yellow and the Volcano Alert Level to Advisory on 12 July following several weeks of increasing seismicity and elevated temperatures in the summit crater identified in satellite images. In addition incandescence in the crater was visible during an overflight. Seismic tremor continued to be elevated at least through 16 July.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Categorías: Gaia «chunga»

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

Mié, 2019/07/17 - 09:08

The Darwin VAAC reported that on 12 July an ash plume from Kerinci rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted SW, based on satellite images and weather models.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Popocatepetl (Mexico) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

CENAPRED reported that each day during 9-15 July there were 49-326 steam-and-gas emissions from Popocatépetl, some of which contained minor amounts of ash. As many as three explosions per day were recorded, though weather conditions often prevented visual characterization of ash emissions. An explosion at 1949 on 11 July generated an ash plume that rose 2.8 km above the crater rim. The Alert Level remained at Yellow, Phase Two (middle level on a three-color scale).

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

Categorías: Gaia «chunga»

Reventador (Ecuador) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

IG reported that during 10-16 July 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 plumes were visible rising at least 600 m above the crater rim and drifting W and N. Blocks were observed rolling 500-600 m down the flanks on 10 and 16 July.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Categorías: Gaia «chunga»

Villarrica (Chile) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

POVI reported that webcam images captured deposits of incandescent material on the flank 300 m from Villarrica?s summit crater in the morning of 15 July. Incandescent material from lava fountaining ejected above the crater rim was periodically visible on 16 July.

Source: Proyecto Observación Villarrica Internet (POVI)

Categorías: Gaia «chunga»

Asosan (Japan) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

JMA reported that sulfur dioxide emissions at Asosan?s Nakadake Crater reached a high value of 2,300 tons per day on 12 July. Very small events ejected sediment during 13-16 July. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Categorías: Gaia «chunga»

Nevados de Chillan (Chile) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

ONEMI and SERNAGEOMIN reported that an explosive event at Nevados de Chillán?s Nicanor Crater recorded at 0657 on 14 July was associated with a long-period earthquake signal. The explosion ejected incandescent material onto areas near the crater. The Alert Level remained at Orange, the second highest level on a four-color scale, and residents were reminded not to approach the crater within 3 km. ONEMI maintained an Alert Level Yellow (the middle level on a three-color scale) for the communities of Pinto, Coihueco, and San Fabián.

Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI) ,Servicio Nacional de Geología y Minería (SERNAGEOMIN)

Categorías: Gaia «chunga»

Stromboli (Italy) - Report for 10 July-16 July 2019 - NEW

Mié, 2019/07/17 - 09:08

INGV reported that the paroxysmal explosive sequence at Stromboli on 3 July changed the morphology of the crater terrace. The rim of the terrace facing the Sciara del Fuoco was removed, and the N1 and N2 vents in Area N (north crater area, NCA) had enlarged and merged into one. After the paroxysmal event explosive activity rapidly decreased, though it remained more intense than normal. The vents of Area C-S (South Central crater area) produced explosions regularly during 8-14 July, and fed lava flows that traveled about halfway down the Sciara del Fuoco. Material from the lava-flow fronts rolled all the way to the coastline. A new lava flow from Area N (north crater area, NCA) began at 1900 on 14 July.

Source: Sezione di Catania - Osservatorio Etneo (INGV)

Categorías: Gaia «chunga»

Ubinas (Peru) - Report for 10 July-16 July 2019 - NEW

Mié, 2019/07/17 - 09:08

Instituto Geofísico del Perú (IGP) reported that seismic activity at Ubinas remained elevated during 1-15 July; volcano-tectonic events averaged 279 per day and long-period events (indicating fluid movement) averaged 116 events per day. Minor bluish emissions rose from the crater. The Alert Level remained at Yellow (on a 4-level scale).

Sources: Instituto Geofísico del Perú (IGP),Instituto Geológico Minero y Metalúrgico (INGEMMET)

Categorías: Gaia «chunga»

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

Mié, 2019/07/17 - 09:08

The Darwin VAAC reported that on 15 July an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted NE based on satellite images and weather models. 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)

Categorías: Gaia «chunga»

Semeru (Indonesia) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

The Darwin VAAC reported that on 10 July an ash plume from Semeru rose to an altitude of 4.3 km (14,000 ft) a.s.l. and drifted WNW based on satellite images and weather models. Ash plumes rose to 4 km (13,000 ft) a.s.l. on 13 July and drifted NW and W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Sangeang Api (Indonesia) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

The Darwin VAAC reported that during 10-16 July ash plumes from Sangeang Api were visible in satellite images rising to 2.1-3 km (7,000-10,000 ft) a.s.l. and drifting in multiple directions. The Alert Level remained at 2 (on a scale of 1-4).

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Manam (Papua New Guinea) - Report for 10 July-16 July 2019 - NEW

Mié, 2019/07/17 - 09:08

The Darwin VAAC reported that on 12 July an ash plume from Manam rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted N, based on satellite data and weather models.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Colima (Mexico) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima reported that intermittent steam-and-gas emissions, mainly from the NE side of the crater, and two small explosions were recorded during 5-12 July. Five lahars descended the Montegrande ravine. An overflight on 9 July revealed that the diameter of the vent had slightly increased, likely caused by subsidence, and other areas of minor subsidence within the crater were noted. An area of collapsed material on the outer W wall was also identified. Temperatures inside the crater were 116 degrees Celsius, lower than the temperature of 250 degrees Celsius recorded in May. The temperatures in the fumarolic area decreased from 202 degrees Celsius in May to 169 degrees. A thermal camera located S of the volcano recorded thermal anomalies associated with fumarolic emissions. Weather conditions sometimes prevented observations of the crater.

Source: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima

Categorías: Gaia «chunga»

Klyuchevskoy (Russia) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

KVERT reported that a weak thermal anomaly over Klyuchevskoy was visible in satellite images during 4-5 and 7 July. 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»

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

Mié, 2019/07/17 - 09:08

JMA reported that during 8-16 July very small eruptive events were detected at Minamidake crater (at Aira Caldera?s Sakurajima volcano), though none of them were explosive. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Categorías: Gaia «chunga»

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

Mié, 2019/07/17 - 09:08

Based on satellite and wind model data, and notices from PVMBG, the Darwin VAAC reported that during 11-16 July ash plumes from Dukono rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted N and NE. 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)

Categorías: Gaia «chunga»

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

Mié, 2019/07/17 - 09:08

Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 5-12 July that sent ash plumes up to 3.5 km (11,500 ft) a.s.l. The plumes drifted S. A thermal anomaly was visible in satellite images on 11 July. 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»

Karymsky (Russia) - Report for 10 July-16 July 2019

Mié, 2019/07/17 - 09:08

KVERT reported that a thermal anomaly over Karymsky was identified in satellite images during 4-5 July. 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»