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Report on San Miguel (El Salvador) — 23 October-29 October 2002


San Miguel

Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
23 October-29 October 2002
Managing Editor: Gari Mayberry

Please cite this report as:

Global Volcanism Program, 2002. Report on San Miguel (El Salvador). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 23 October-29 October 2002. Smithsonian Institution and US Geological Survey.

Weekly Report (23 October-29 October 2002)

San Miguel

El Salvador

13.434°N, 88.269°W; summit elev. 2130 m

All times are local (unless otherwise noted)


A news report stating that a rockslide released dangerous fumes at San Miguel on 17 October was found to be false.

Geological Summary. The symmetrical cone of San Miguel, one of the most active volcanoes in El Salvador, rises from near sea level to form one of the country's most prominent landmarks. A broad, deep, crater complex that has been frequently modified by eruptions recorded since the early 16th century caps the truncated unvegetated summit, also known locally as Chaparrastique. Flanks eruptions of the basaltic-andesitic volcano have produced many lava flows, including several during the 17th-19th centuries that extended to the N, NE, and SE. The SE-flank flows are the largest and form broad, sparsely vegetated lava fields crossed by highways and a railroad skirting the base of the volcano. Flank vent locations have migrated higher on the edifice during historical time, and the most recent activity has consisted of minor ash eruptions from the summit crater.

Source: Associated Press