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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Ambae (Vanuatu) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

Based on satellite, pilot, and webcam observations, the Wellington VAAC reported that during 8-9 February ash plumes from Aoba rose to altitudes of 2.7-3 km (9,000-10,000 ft) a.s.l. and drifted N and E.

Source: Wellington Volcanic Ash Advisory Center (VAAC)

Categorías: Gaia «chunga»

Bagana (Papua New Guinea) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 7-8 February ash plumes from Bagana rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted NE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Pacaya (Guatemala) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

INSIVUMEH reported that during 7-13 February Strombolian explosions at Pacaya?s Mackenney Crater ejected material 30 m above the main cone. Lava flows were at most 150 m long on the SW and W flanks.

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

Categorías: Gaia «chunga»

Popocatepetl (Mexico) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

Each day during 7-13 February CENAPRED reported 25-101 emissions from Popocatépetl, with emissions during 11-13 February containing slight amounts of ash. Explosions were detected at 0130 and 2213 on 7 February, at 0457 on 8 February, at 1729 on 12 February, and at 0631 on 13 February. Minor crater incandescence was visible on the morning of 9 February, and at night during 11-12 February. The Alert Level remained at Yellow, Phase Two.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

Categorías: Gaia «chunga»

Santa Maria (Guatemala) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

INSIVUMEH reported that explosions at Santa María's Santiaguito lava-dome complex, detected by the seismic network during 7-13 February, generated ash plumes that rose as high as 700 m and drifted SW. Avalanches of material descended the E and SE flanks of the lava dome. Ash fell on La Florida ranch (5 km S) on 10 February.

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

Categorías: Gaia «chunga»

Shishaldin (United States) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

On 7 February AVO reported that seismic and infrasound activity from Shishaldin declined to background levels during the previous month, prompting the observatory to lower the Aviation Color Code to Green and the Volcano Alert Level to Normal.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Categorías: Gaia «chunga»

Fuego (Guatemala) - Report for 7 February-13 February 2018 - NEW

Mié, 2018/02/14 - 07:13

INSIVUMEH reported that explosions at Fuego during 7-13 February generated ash plumes that rose as high as 1.5 km and drifted 10-12 km N, NW, SW, and S. Avalanches of material traveled down the Seca (W), Ceniza (SSW), and Taniluyá (SW) drainages on 12 February, and down the Las Lajas (SE) and Honda (E) drainages on 13 February. Ash fell in areas downwind on 13 February including Morelia (9 km SW) and Panimaché (8 km SW).

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

Categorías: Gaia «chunga»

Dukono (Indonesia) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 7-13 February ash plumes from Dukono rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted NE, E, and SE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Categorías: Gaia «chunga»

Cleveland (United States) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

AVO reported that there was no evidence of significant activity at Cleveland since the last explosion was detected on 18 December 2017. The Aviation Color Code was lowered to Yellow and the Volcano Alert Level was lowered to Advisory. AVO noted that low-level unrest continued.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Categorías: Gaia «chunga»

Ebeko (Russia) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

Based on observations by volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, explosions during 5-8 February generated ash plumes that rose as high as 2.4 km (7,900 ft) a.s.l. Ash fell in Severo-Kurilsk on 8 February. 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 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

KVERT reported that a thermal anomaly over Karymsky was identified in satellite images on 3 February. 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»

Mayon (Philippines) - Report for 7 February-13 February 2018 - NEW

Mié, 2018/02/14 - 07:13

PHIVOLCS reported that during 7-13 February activity at Mayon continued to be characterized daily by lava effusion from the summit crater, rockfalls, lava fountains, steam emissions, advancing lava flows on the flanks, and pyroclastic flows. Numerous rockfall events were generated from the front and margins of advancing lava flows. Lava fountaining was nearly continuous during 6-10 February, with around 290 lava-fountaining events recorded by the seismic network from 0557 on 5 February until around 0700 on 10 February. The events each lasted between 3 and 233 minutes, and were accompanied by rumbling sounds audible with a 10-km radius. Lava fountaining was sporadic during 11-13 February. Lava fountains during phases of both nearly continuous and sporadic activity rose as tall as 400 m, and produced steam plumes up to 2.5 km above the crater that drifted in multiple directions. Lava flows advanced to 3.3 km, 4.5 km, and 900 m in the Mi-isi (S), Bonga (SE), and Basud (E) drainages, respectively. Pyroclastic density currents traveled 4.2-4.6 km in the Mi-isi, Bonga, and Basud drainages. The Alert Level remained at 4 (on a 0-5 scale) and the public was warned to remain outside of the Danger Zone defined as an area within an 8-km radius.

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

Categorías: Gaia «chunga»

Kadovar (Papua New Guinea) - Report for 7 February-13 February 2018 - NEW

Mié, 2018/02/14 - 07:13

RVO reported that on 9 February the lava dome at Kadovar?s SE Coastal Vent collapsed, causing 5-6 minor tsunamis, less than 1 m high, observed by residents on Blup Blup?s E and W coasts. The waves were reported at 1050, before the main collapse of the dome. In a 12 February report RVO noted that activity from Main Crater consisted of white plumes rising 20 m and drifting a few kilometers SE and weak nighttime crater incandescence.

Source: Rabaul Volcano Observatory (RVO)

Categorías: Gaia «chunga»

Sabancaya (Peru) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that explosive activity at Sabancaya was similar to the previous week; there was an average of 18 explosions recorded per day during 5-11 February. Seismicity was dominated by long-period events, with signals indicating emissions. Gas-and-ash plumes rose 3.9 km above the crater rim and drifted 50 km NW, SW, S, and SE. The MIROVA system detected three thermal anomalies. The sulfur dioxide flux was high, at 2,062 tons per day on 10 February. The report noted that the public should not to approach the crater within a 12-km radius.

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

Categorías: Gaia «chunga»

Agung (Indonesia) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

On 10 February PVMBG reported that activity at Agung had declined during the previous month or two leading the observatory to lower the Alert Level to 3 (on a scale of 1-4) and adjusted the exclusion zone to a 4-km radius. The report noted that the tallest eruption plume in January was 2.5 km above the crater rim, occurring on 19 January, and the last event on 24 January generated a plume that rose 1 km. The volume of erupted lava was an estimated 20 million cubic meters in December 2017, and had not significantly changed. Seismicity continued to fluctuate, though the number and magnitude of events had declined. Satellite data showed a decrease in thermal output reflective of a reduced lava flow rate. PVMBG warned that activity at Agung is still high and unstable; tiltmeter data showed low rates of inflation (GPS patterns were stable) and gas-emission data indicated magma movement at depth, though at a lower intensity compared to values measured at the end of November 2017. An event at 1149 on 13 February generated as ash plume that rose 1.5 km above the crater rim.

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

Categorías: Gaia «chunga»

Aira (Japan) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

JMA reported that very small events occurred at Minamidake crater (at Aira Caldera?s Sakurajima volcano) during 7-9 February. Crater incandescence from the summit crater was visible during 8-10 February. An event at 2201 on 11 February generated a plume that rose 1 km 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 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

During 7-13 February HVO reported that the lava lake continued to rise, fall, and spatter in Kilauea?s Overlook crater. Webcams recorded incandescence from a small lava pond in a pit on the W side of Pu'u 'O'o Crater. Surface lava flows were active above and on the pali, and on the coastal plain.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Categorías: Gaia «chunga»

Sheveluch (Russia) - Report for 7 February-13 February 2018

Mié, 2018/02/14 - 07:13

KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 1-4 and 7 February. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Categorías: Gaia «chunga»

Karangetang (Indonesia) - Report for 31 January-6 February 2018 - NEW

Mié, 2018/02/07 - 07:39

In a VONA issued on 2 February, PVMBG reported an eruption at Karangetang, characterized by crater incandescence and an ash plume that rose 600 m. The Aviation Color Code was raised from Unassigned to Yellow.

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

Categorías: Gaia «chunga»

Nevados de Chillan (Chile) - Report for 31 January-6 February 2018

Mié, 2018/02/07 - 07:39

Servicio Nacional de Geología and Minería (SERNAGEOMIN) Observatorio Volcanológico de Los Andes del Sur (OVDAS) reported that growth of the lava dome in Nevados de Chillán?s Nicanor Crater was 2,540 m3/day, determined by photos taken during overflights on 23 and 31 January. The total volume of the lava dome was an estimated 106,700 m3. A small area of deposits from collapses of the dome walls was observed. Temperatures on the surface of the dome were 305 and 480 degrees Celsius, mainly from a crack which generated the explosions. A larger explosion from a possible partial dome collapse was recorded at 1202 on 2 February, generating a gas-and-ash plume that rose about 2.5 km above the crater rim. Shock waves from the explosion were reported in the community of Las Trancas (10 km) and at the Gran Hotel Termas de Chillan (5 km). Explosive activity continued through 6 February. The Alert Level remained at Yellow, the middle level on a three-color scale, and the public was reminded not to approach the craters within a 4-km radius.

Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)

Categorías: Gaia «chunga»