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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Ilopango
The 13 x 17 km Ilopango caldera is filled by one of El Salvador's largest lakes. The caldera, which has a scalloped 150-500 m high rim, lies immediately east of the capital city of San Salvador (upper left). The latest caldera collapse event occurred during the massive 536-550 CE eruption, which produced widespread pyroclastic flows and devastated early Mayan cities. Post-caldera eruptions formed a series of lava domes within the lake and near its shore. Photo by Carlos Pullinger, 1996 (Servicio Nacional de Estudios Territoriales, El Salvador).
Volcano Number:
343060
Volcano Name:
Ilopango
Country:
El Salvador
Volcano Type:
Caldera
Last Eruption:
1880 CE
Elevation:
450m
Tectonic Setting:
Subduction zone / Continental crust (> 25 km)
Pop. within 5km:
2049583
Pop. within 10km:
2049583
Pop. within 30km:
2948989
Pop. within 100km:
6689160
Latitude:
13.672
Longitude:
-89.053
Details
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The 8 x 11 km Ilopango caldera, filled by one of El Salvador's largest lakes, has a scalloped 150-500 m high rim. The caldera, which lies immediately east of the capital city of San Salvador, is strongly controlled by regional faults of the central Salvador graben. Four major dacitic-rhyolitic explosive eruptions during the late Pleistocene and Holocene produced pyroclastic-flow and pyroclastic-fall deposits that cover much of El Salvador. The latest collapse resulted from the massive 5th century CE Tierra Blanca Joven (TBJ) eruption, which produced widespread pyroclastic flows and devastated early Mayan cities. Post-caldera eruptions formed a series of glassy dacitic and andesitic lava domes within the lake and near its shore. The Islas Quemadas, a group of low islets in the center of the lake that mark the summit of a largely submerged lava dome, were formed during an eruption in 1879-80.
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Eruption Data from the Global Volcanism Program of the Smithsonian Institution
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Emissions Data from the Global Volcanism Program of the Smithsonian Institution
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Data from the Earthchem Library
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Data from the Earthchem Portal
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Data from the SESAR Database
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Data from the MaGa Database
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Data from UNAVCO
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Data from USIEI
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Data from IRIS FDSNWS
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