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.
Actualizado: hace 5 horas 48 mins

Merapi (Indonesia) - Report for 9 May-15 May 2018 - NEW

Mié, 2018/05/16 - 09:52

PVMBG reported that an explosive eruption occurred at 0740 on 11 May. The eruption began with a small roar and vibrations that were felt at the observation post for 10 minutes. The eruption plume rose to 5.5 km (18,000 ft) above the peak. There was no seismic precursor and no seismic activity continued after the event. PVMBG did not change the alert level from Green/Normal; they interpreted the event as a minor eruption triggered by the accumulation of volcanic gases unlikely to be followed by further eruptions.

Sources: Jakarta Post,Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Categorías: Gaia «chunga»

Oraefajokull (Iceland) - Report for 9 May-15 May 2018 - NEW

Mié, 2018/05/16 - 09:52

On 4 May, the Icelandic Met Office reduced the Aviation Color Code at Öræfajökull from Yellow to Green due to signs of reduced activity. Since September 2017 there has been less earthquake activity, stable hydrological and geochemical measurements, and reduced geothermal heat output. There has been possible minor ongoing inflation, but no signs of an imminent eruption.

Source: Icelandic Met Office (IMO)

Categorías: Gaia «chunga»

Sangeang Api (Indonesia) - Report for 9 May-15 May 2018 - NEW

Mié, 2018/05/16 - 09:52

Based on a VONA from PVMBG, on 9 May a gas emission was observed at 1807 from Sangeang Api that rose to 4,150 m (13,000 ft) a.s.l. and drifted west. On 9 May the Aviation Color Code was changed from unassigned to Yellow.

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

Categorías: Gaia «chunga»

Fuego (Guatemala) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

Small ash explosions at Fuego on 11 and 12 May rose to 5 km (15,000 ft) a.s.l., or approximately 1 km (3,280 ft) above the summit. The ash dispersed quickly to the southwest and was visible on webcams.

Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH),Washington Volcanic Ash Advisory Center (VAAC)

Categorías: Gaia «chunga»

Langila (Papua New Guinea) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 13 May at 0709 an ash plume from Langila rose to an altitude of 5.5 km (17,000 ft) a.s.l. and drifted W. An image acquired around six hours later indicated that the ash from the event had dissipated.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Bagana (Papua New Guinea) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 11 May at 0900 an ash plume from Bagana rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted SW. The plume dispersed within six hours.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Piton de la Fournaise (France) - Report for 9 May-15 May 2018 - NEW

Mié, 2018/05/16 - 09:52

OVPF reported that the eruption at Piton de la Fournaise, which began on 27 April from fissures at Rivals Crater, continued through 15 May. Field reconnaissance on 10 May revealed that activity was focused on the main cone, with some activity from a second cone that was ejecting material 10-20 m high. Over the next two days the crater of the main cone narrowed and lava projections at both cones became rare. Lava flows during this time were often confined to tubes, with some breakouts at the change in slope below Piton de Bert, about 3 km from the active cone. Burning vegetation as a result of the breakouts was visible on and at the foot of the rampart. Based on satellite data when surface flows were visible, lava emission rates were estimated to be about 1-2 cubic meters/second. Tremor intensity fluctuated over the week, with a sharp increase during 0500 and 0900 on 15 May.

Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)

Categorías: Gaia «chunga»

Popocatepetl (Mexico) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

CENAPRED reported that each day during 9-15 May there were 51-137 steam and gas emissions from Popocatépetl as well as ongoing incandescence from the summit. Additionally, three explosions were recorded: at 1834 on 11 May, at 0912 on 11 May, and at 1452 on 14 May. These explosions dispersed ash to the S and SW. Volcano-tectonic earthquakes with magnitudes up to M 2.8 also occurred throughout the time period.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

Categorías: Gaia «chunga»

Reventador (Ecuador) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

During 9-15 May, IG reported ongoing high levels of eruptive activity at Reventador. Steam, gas, and ash emissions continued, with plumes moving to the N and W. On 12 and 13 May, a small lava flow was observed on the E flank 700 m below the summit.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Categorías: Gaia «chunga»

Stromboli (Italy) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

INGV reported typical activity at Stromboli from 7 to 13 May, with 2-4 hourly low-intensity explosions to heights of less than 80 m (300 ft) above the crater, in the North crater area. Fine ash as well as lapilli and bombs were ejected. The South Central crater area vents produced between 5-12 hourly, low-intensity explosions, also to heights of less than 80 m above the crater. Continuous degassing was also observed from these vents. On 13 May there was an increased frequency of explosions, with 16 events/hour. No significant variations were reported in seismological, deformation, or geochemical parameters.

Source: Sezione di Catania - Osservatorio Etneo (INGV)

Categorías: Gaia «chunga»

Suwanosejima (Japan) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

The Tokyo VAAC reported that explosions occurred at Suwanosejima on 15 May, based on information from JMA.

Source: Japan Meteorological Agency (JMA)

Categorías: Gaia «chunga»

Karymsky (Russia) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

Based on satellite data, KVERT reported that during 11-14 May explosions at Karymsky generated ash plumes that rose as high as 3.5 km (11,500 ft) and drifted 145 km SW. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source:

Categorías: Gaia «chunga»

Kirishimayama (Japan) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

JMA reported that at Shinmoedake (Shinmoe peak), a stratovolcano of the Kirishimayama volcano group, an eruption occurred between 1444 and 1610 on 14 May. The plume rose to 4.5 km (15,000 ft) above the crater and drifted SE. A pyroclastic flow travelled 2 km down the flank. Volcanic earthquake rates under the crater increased after the eruption. Shallow, low-frequency earthquakes and tremor were also reported. The Alert Level remained at 3 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Categorías: Gaia «chunga»

Turrialba (Costa Rica) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

OVSICORI reported that there were strong emissions of SO2 from Turrialba, accompanied by vigorous fumarolic activity and jetting noises. An ash plume was reported on 10 May, with ashfall in La Pastora de Santa Cruz de Turrialba and Pacayas. A weak water vapor and gas plume was detected at 0920 on 13 May, rising 300-500 m (1000-1600 ft) above the summit. Seismicity was low, with low-amplitude long-period earthquakes and some low-amplitude tremor. Continuous low-amplitude tremor was report on 13 May.

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

Categorías: Gaia «chunga»

Dukono (Indonesia) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 9-15 May ash plumes from Dukono rose to altitudes of 1.5-2 km (4,500-6,000 ft) a.s.l. and drifted E and S.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Ebeko (Russia) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions at Ebeko on 4 May and during 6-10 May that sent ash plumes as high as 2.4 km (7,875 ft) a.s.l. 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»

Sabancaya (Peru) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

Intermittent ash and gas emissions at Sabancaya during 9-15 May were reported by the Buenos Aires VAAC, with plume altitudes reaching 7-9 km (2,300-3,000 ft) a.s.l.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

Categorías: Gaia «chunga»

Aira (Japan) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

JMA reported that during 7-11 May there were 12 events, three of which were explosions, at Minamidake crater (at Aira caldera?s Sakurajima volcano). Tephra was ejected as far as 700 m from the crater, and ash plumes rose as high as 2.8 km (9,200 ft) above the crater rim. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Categorías: Gaia «chunga»

Kilauea (United States) - Report for 9 May-15 May 2018 - NEW

Mié, 2018/05/16 - 09:52

On 9 May the intermittent eruption of lava in Leilani Estates in the lower East Rift Zone (ERZ) of Kilauea continued. In the northeast part of the area, fissure 15 extended across Poihiki Road, generating a pahoehoe flow about 20 m (66 ft) long. In the summit caldera, steady lowering of the Overlook Crater lava lake within Halema`uma`u crater raised the potential for steam-driven explosions if the lava column dropped to the groundwater level and allowed water into the conduit. On 10 and 11 May, little new extrusive activity was noted from the ERZ fissures, though there were continued earthquakes, ground deformation, and considerable gas discharge. Tiltmeters recorded ongoing deflation and the Overlook crater lava level continued to drop.

Categorías: Gaia «chunga»

Sheveluch (Russia) - Report for 9 May-15 May 2018

Mié, 2018/05/16 - 09:52

KVERT reported that a weak thermal anomaly over Sheveluch was identified in satellite images during 10-14 May. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Categorías: Gaia «chunga»