August 19 , 2015. English. Cotopaxi, Karangetang, Tupungatito .
August 19 , 2015.
Cotopaxi, Ecuador :
The internal activity, based on seismicity is considered to be high and the surface activity as moderate.
An overview of Cotopaxi by scientists of IGEPN on board of an aircraft of the Air Force Ecuadorian on August 18 showed continued emissions but few energy of ash and steam, which are diluted on the west side of the volcano without reaching a significant altitude. No lahar, or pyroclastic flow are identified; some of summital glaciers are covered with gray ash.
Seismicity: From 6:00 p.m. to 6:00 a.m it was recorded 110 long-period events (LP) and 75 episodes of tremor emission.
Observations, emissions and ashes: In the afternoon, at 6:24 p.m. yesterday, an emission of ash to a height of 700 meters above the crater, drifting westward was reported. Currently, the volcano is clear and emission are observed with an ash content, down the western flank of the volcano because of the wind.
It was not observed an eruption column rising from the volcano, or reports of ash fall.
Karangetang , Siau island , Indonésia :
Thermal signals from the volcano have been increasing over the past days, suggesting that the lava output at the summit crater has increased. This could again again to dangerous pyroclastic flows if the lava dome or lava flows become unstable on the steep upper flanks of the volcano. Such flows can easily reach inhabited areas.
During the past months (at least since May) the volcano has been constantly active with a weakly alimented lava flow on the upper southern flank, which has been generating frequent incandescent rock falls. It decreased during July, but a new phase of more violent activity might be in the making now and could make new evacuations necessary. Alert level of the volcano remains at 3 (out of 4).
Source : T Pfeiffer. http://www.volcanodiscovery.com
Photo : 28.04.2015 VSI Badan Geologi
Tupungatito , Chili :
The National Geology and Mining Service (Sernagomin) detected an activity , Monday on Tupungatito volcano.
It was recorded an earthquake measuring M 3.2 on the Richter scale, 25 km northwest from the main crater associated with rock fracturing, at a depth of 8.2 kilometers.
The institution said the volcano kept its level of alert Green, but with « special attention« .
SERNAGEOMIN said the volcano is located in the upper reaches of the Colorado River, an affluent of the Maipo River, 65 km north of Pirque. It has eight craters that have focused historical eruptive activity and are the seat of permanent fumaroles.
Historical records of eruptions are reported 19 events in 1829 and 25 events since 1646. His most recent eruption occurred in 1959-1960 with recognizable filing, issuance of a lava flow of 1.85 kilometers from long and ash falls in Argentina. The slight increase in the most recent event took place in 1986 with a small column of black ash that covered a small area of its glaciers, the agency said.
Tupungatito volcano, the northernmost historically active volcano of the central Chilean Andes, is located along the Chile-Argentina border about 90 km E of Santiago and immediately SW of the Pleistocene Tupungato volcano. Tupungatito consists of a group of 12 Holocene andesitic and basaltic andesite craters and a pyroclastic cone at the NW end of the 4-km-wide, Pleistocene dacitic Nevado Sin Nombre caldera, which is filled by glaciers at its southern end and is breached to the NW. Lava flows from the northernmost vent have traveled down the NW flank breach. Tupungatito has produced frequent mild explosive eruptions during the 19th and 20th centuries.
Source : 24horas.cl , GVP,
Photos : 24 horas, Mariusz Potocki.