Machin volcano (Colombia) activity update: occasional shallow earthquake swarms
Wednesday Sep 12, 2012 10:05 AM | VON: T
Seismic signal this morning (CIMA station)At the moment, seismicity Machin is calm again. INGEOMINAS summarizes the recent 2 earthquake swarms on 9 Sep between 7:30 and 8:30 (local time) and the following day 10 Sep between 07:20 and 14:00.
Some of the quakes during these swarms were felt by inhabitants of villages near the volcano. The epicenters of the quakes were clustered at 2-4 km depth W and S of the summit dome, and the largest was the M3.6 event on 9 Sep.
Tuesday, Sep 11, 2012
Another small swarm of quakes occurred on 10 Sep and then ceased. At the moment, seismicity is again low. [mehr]
Sunday, Sep 09, 2012
At 07:32 local time 9 Sep, a 3.6 magnitude quake occurred at 3.2 km depth beneath the summit of the volcano. Seismicity had been elevated since 8 Sep and stronger than normal seismic activity has been following the quake today. This is the most energetic seismic activity at the volcano for probably more than a year. [mehr]
Wednesday, Sep 05, 2012
Weak volcanic quakes concentrated SE of the main dome at depths between 3.0 - 9.5 km occurred during the past week. [mehr]
Wednesday, Aug 29, 2012
No significant changes have been occurring. Weak seismic unrest continues at Cerro Machín with some small volcanic quakes clustered at depths between 3-6 km south and southwest under the main summit. The largest event was a magnitude 0.55 on 22 August at 08:27 local time. [mehr]
Tuesday, Aug 07, 2012
Seismicity at Machin remains at slightly elevated levels with some weak earthquakes SE under the lava dome at depths between 3.5 and 5 km. [mehr]