النشاط بركان 18 نوفمبر، 2012

هذا آخر (تقريبا) يوميا وتعتزم متابعة التغييرات نشاط البراكين في جميع أنحاء العالم.
وهذا الموضوع كتب بواسطة جيولوجي ريتشارد ويلسون الذي يتخصص في الزلزالية بركان وVervaeck أرمان. لا تتردد في إخبارنا عن نشاط جديد أو تغيير إذا لم نكتب عن ذلك. -

18 نوفمبر، 2012 النشاط البركان

يذكر Sitkin volcano (Aleutians)appears to be preparing for another round of swarm activity. Earthquake magnitudes and numbers are up again today. (station LSSA)
Seismicity continues to slowly dwindle beneath the South Moat of طويل وادي كالديرا (CA). Only a few small quakes visible on the most recent seismograms. (station MMX1)
While surface activity is down, volcanic tremor and small earthquakes are visible on the seismic record from البركان volcano (Mexico) today. Ignore the repeating pattern prior to 17z, it is due to a malfunction of the web software.
Tremor remains relatively continuous and at somewhat higher than normal levels at بكايا (محطة PCG) و فويغو (station FG3) volcanoes (Guatemala).
Tremor has run a little higher than normal during the past week at ماسايا volcano (station MASN) (Nicaragua) as well. Infrequent small local earthquakes are also visible embedded in the activity. At nearby كونسيبسيون volcano (station CONN) pulses of volcanic tremor have become slightly stronger, but less frequent.
Low level tremor (and what appear to be small earthquakes) remains on seismograms recorded at Ruapehu volcano (New Zealand) this morning. Small local earthquakes still dot the تونغاريرو seismogram and continuous tremor hums beneath White Island volcano again today. I have included spectrograms recorded at each of the volcanoes which shows a recent, slight increase in tremor at Ruapehu (also recorded at Tongariro? Or is it weather noise?) in contrast with a strong low-frequency tremor signal at أبيض جزيرة.
Recent satellite imagery shows a relatively weak SO2-rich plume drifting from Popocatepetl (in-step with reduced surface activity at the volcano), and a much more prominent gas plume hovering over, as usual, نييراجونجو volcano (DRC).

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