December 03, 2015. EN. Etna, Momotombo, Sabancaya .
December 03, 2015.
Etna, Sicily :
Last night, the eruptive activity of Etna was concentrated in the Voragine crater with an eruption almost continuously and significantly more intense than in recent weeks (similar to the intensity of the activity in the same crater in February -March 2013 and January 2015, but constant). Occasionally, incandescent bombs are sent to tens of meters above the crater.
This morning, the tremor, which had a peak last night is completely back down.
Commentaire de Boris Behncke : « I always said, the Voragine is Etna’s laziest but potentially most violent summit crater. Well, tonight she’s proved that this statement is still valid.. »
To follow with the communique of the INGV
Source : B Behncke
Photo : Turi Caggegi
Momotombo, Nicaragua :
Activity Bulletin of November 2, 2015.
As of yesterday at 7:49, has started a new eruptive phase of the Momotombo volcano. If within the first 12 hours, gas explosions and ash predominated, it was recorded from 7:27 p.m. yesterday, explosions that were accompanied by the expulsion of incandescent material, and volcanic tremors.
After 9 o’clock last night, yesterday, was noted an increase in the number of explosions and the expulsion of volcanic lava, mainly during the first hours of today, reaching a maximum height of 3 km above the crater of the volcano. The lava flow has started to descend down the slope to the north east of the volcano, following the lava channel created during the eruption of 1905. The lava emission dropped significantly to 5:00 am.
The lava descended 600 meters on the slopes of the volcano.
Currently, the expulsion of ash and gas, reaching a height of 800 meters above the crater and moves to the northwest side of the volcano to reach the Pacific coast.
Ash falls were reported in the communities of Puerto Momotombo, community Momotombo, La Paz Centro, Telica, Chinandega, Tonalá, Isla Aserradores, Padre Ramos Peninsula and Peninsula of Venecia.
The data collected by measuring instruments about seismic and volcanic activity indicate that this will continue over the coming days.
It is therefore recommended to the population to stay calm and keep abreast of the information provided by our government.
Source : Ineter.
Photo : Canal 4 Nicaragua /Jairo Cagina ,Esteban Felix/AP , Avcan.
Sabancaya, Peru :
The LP type of seismicity (associated with the passage of fluids), in analyzing this week, has increased significantly, from an average of 43 LP / day (Report No. 42-2015) to 53 LP / day. On the other hand, seismic energy LP is low.
The number of hybrid-type events (associated with the rise of magma material) was not recorded.
Seismic events VTPS or « proximal volcano-tectonic » (very close to the volcano, less than 6 km), presented the order of magnitude of values of M 2.5 and M 2.7. During this period the type of VTP seismicity recorded a mean decrease from 14 VTPS / day to 5 VTPS / day in the last week. In addition, the maximum magnitude of earthquake generated by a VTP is M 2,7.
Tremor type events have registered an average of 8 TREM / day, similar to the previous report. Also energy has seen a marked increase mainly Nov. 24 after the event recorded at 16h02 UTC, reaching 485 MJ , then declined.
The proximal seismicity located 6 km from the crater of the volcano Sabancaya were distributed mainly to the north and east. A total of 14 events were recorded VTP. The largest magnitude earthquake is in this region and reached a value of M2,7, with a depth of 12 km (11/30/2015 1:06 p.m. UTC). The event was located 6 km NNE of the crater of the volcano Sabancaya. In addition the type of seismicity VT (distal seismicity) was presented dispersed in a direction North, East and South, at distances of 13 and 22 km of Sabancaya. A total of 68 events of magnitude between M3.6 and M1,5 were located. Two major events were recorded; the first of M 3.6 on 11/25/2015 at 3:12 UTC and a depth of 5 km, while the second was registered on 11.25.2015 at 5:57 p.m. UTC and at a depth of 30 km.
Frequency: The fumaroles coming from the crater of the volcano Sabancaya were constant during this period and were of an medium density.
Colouring: Mainly, they have been and continue to be white (water vapor). To a lesser extent, but currently, a gas is distinguished from bluish color (magmatic gases) on different days of the period.
Height: During this period (November 24-30), the maximum height of fumarolic emissions ranged between 800 and 1100 meters above the base of the crater.
Source : IGP