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San Salvador volcano
stratovolcano 1893 m / 6,211 ft
El Salvador, 13.73°N / -89.29°W
Current status: normal or dormant (1 out of 5)
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San Salvador volcano eruptions:
1917, 1806 (?), 1671, 1658, 1572 ± 2, ?1200, 640 AD ± 30 years
Typical eruption style:
effusive flank fissure eruptions
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Sentinel hub | Landsat 8
 

Mexican earthquake might have triggered seismic swarm at San Salvador volcano, El Salvador

Thursday Mar 22, 2012 16:33 PM | BY: T

The Mexican 7.4 magnitude earthquake near Acapulco on Tuesday might have affected the currently dormant San Salvador volcano in 1000 km distance and triggered an earthquake swarm under the volcano.
San Salvador volcano is an active stratovolcano immediately northwest of the capital San Salvador City and last erupted in 1917.

The National Service of Territorial Studies (SNET) reported that as of yesterday 21 March 05:30 pm local time, the swarm consisted of 25 quakes, including 8 felt quakes between magnitude 2.2 and 3.3. The quakes were located at shallow depths between 0.5 and 5.8 km under the volcano.
The Red Cross is reported to have sent some members to the volcano area as a precautionary measure, although there were no reports of casualties or damage.

It is possible that the strong Mexican earthquake was the trigger for this swarm as a result of tectonic disturbance of the magma chamber beneath the volcano. Relationships between large earthquakes and volcanic eruptions with effects occurring up to a year after the quake have long been suggested, but are difficult to proof.
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