Team from Yogyakarta Volcano Investigation and Technology Development Center (BPPTK)discover a new phenomenon, many tiny holes formed in Mount Merapi crater.
The holes filled with water in Merapi lava crater plug. These holes diameter about five meters and located on the surface lava plug with reached 150 meters depth. The hottest holes temperature.reached 540 Celsius degrees.
Based on the photographs obtained by Yogyakarta BPPTK team, on Wednesday (2/23/12), there are three water-filled holes in the Merapi lava plug. Earlier, Mount Merapi has never had a crater so deep and filled with water.
Head of Yogyakarta BPPTK, Subandriyo, explain that the emergence of this new phenomenon is closely related to Mount Merapi increasing seismic activity.
He added, there are two possibilities that may form tiny holes in the lava plug. First, the holes appear because there is an accumulation of pressure under the lava plug which led to cracks. Second, the holes may arise due small phreatic eruption of the interaction of rain with hot water from the crater.
Merapi crater after 2010 eruption is very different to the previous situation. Current crater depth is 150 meters with top diameter around 400 meters and base diameter about 300 meters.
Subandriyo said, the crater has an opening that leads to the south with a diameter between 400 to 500 meters. If at any time Mount Merapi eruption again, it does not erupt to the west but southern..
Mount Merapi 2010 eruption change the shape of the crater. Historically, the eruption of Merapi in 2010 had a pattern similar to the last eruption in 1872.
Since two weeks ago, there is increased on Merapi seismic activity, and seismic activity of Merapi began to fall on Saturday, where shallow volcanic earthquake was recorded 35 times, multiphase 47 times, and then a one time avalanches.
It calm down on Sunday with 15 shallow volcanic earthquakes, 24 multiphase times, one miscarriage, and two tectonic earthquakes.
Tidak ada komentar:
Posting Komentar