OREGON STATE UNIVERSITY

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Holuhraun Lava Field


In late August and September 2014, this volcanic region of Iceland began spewing vast amounts of lava.

Rincon de la Vieja (Costa Rica) - Report for 17 September-23 September 2014 - NEW

GVP Eruption Reports - Tue, 09/23/2014 - 8:10am

OVSICORI-UNA reported that at 1237 on 17 September a seismic signal indicating a phreatic explosion at Rincón de la Vieja was detected by a station about 5 km S of the volcano. A second phreatic explosion, detected at 2048 and lasting three minutes, was of a larger magnitude and a longer duration that the first explosion. Phreatic explosions were also detected at 1825 on 19 September and at 0304, 0439, and 0634 on 20 September. Residents on the N flank heard the event on 19 September and saw the explosion at 0634 on 20 September. An overflight of the crater lake on 20 September revealed that the temperature of the lake water was about 45 degrees Celsius, an increase from about 30 degrees measured in April.

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

Slamet (Indonesia) - Report for 17 September-23 September 2014 - NEW

GVP Eruption Reports - Tue, 09/23/2014 - 8:10am

PVMBG reported that during 13-16 September white plumes rose 50-200 m above Slamet's crater. An explosion on 17 September produced a dense blackish-gray ash plume that rose as high as 1.2 km and drifted S and SW. Incandescent material was ejected 200-500 m high and booming noises were reported. Ash fell in areas as far as 20 km S. Although white plumes mostly rose from the crater the next day, an explosion generated an ash plume that rose 500 m and drifted W. During 19-20 September white plumes rose 100 m. The Alert Level remained at 3 (on a scale of 1-4).

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

Karangetang [Api Siau] (Indonesia) - Report for 17 September-23 September 2014

GVP Eruption Reports - Tue, 09/23/2014 - 8:10am

PVMBG reported that although Karangetang was often covered in fog during 7-14 September, observers occasionally noted white plumes rising at most 150 m from the main crater and Crater II. Incandescence from the lava dome was observed at night. Seismicity remained high and was dominated by shallow earthquakes from lava-dome growth and avalanches. The Alert Level remained at 3 (on a scale of 1-4).

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

Lokon-Empung (Indonesia) - Report for 17 September-23 September 2014

GVP Eruption Reports - Tue, 09/23/2014 - 8:10am

PVMBG reported that during 8-14 September observers of Lokon-Empung noted white plumes rising 25-100 m above Tompaluan Crater. On 13 September three explosions from Tompaluan Crater, at 0300, 1146, and 1229, produced white plumes that rose at most 500 m above the crater. Seismicity decreased sharply after the13 September events but continued to remain high relative to the levels detected prior to 10 September. The Alert Level remained at 3 (on a scale of 1-4).

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

Rabaul (Papua New Guinea) - Report for 17 September-23 September 2014 - NEW

GVP Eruption Reports - Tue, 09/23/2014 - 8:10am

RVO reported that Rabaul caldera's Tavurvur cone was mostly quiet during 13-19 September. Variable amounts of white vapor and small amounts of diffuse blue vapor rose from the summit crater. A small explosion at 1242 on 18 September produced a light gray ash plume that rose a few hundred meters above the crater and drifted NW.

Source: Rabaul Volcano Observatory (RVO)

Bagana (Papua New Guinea) - Report for 17 September-23 September 2014

GVP Eruption Reports - Tue, 09/23/2014 - 8:10am

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 21 September an ash plume from Bagana rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 55 km W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Reventador (Ecuador) - Report for 17 September-23 September 2014

GVP Eruption Reports - Tue, 09/23/2014 - 8:10am

IG reported that vapor plumes with a low ash content rose 1-2 km above Reventador and drifted NW and SW during 17-22 September.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

New Eruptions at Mayon in the Philippines Prompts Evacuations

Eruptions! - Wed, 09/17/2014 - 6:19am

Flowing lava and seismic activity at the Mayon volcano prompts the Philippine government to evacuate 24,000 people.

The post New Eruptions at Mayon in the Philippines Prompts Evacuations appeared first on WIRED.