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Cosigüina Volcano | John Seach
Nicaragua
12.98 N, 87.57 W
summit elevation 859 m
stratovolcano
Cosiguina Volcano is located in western Nicaragua. It forms a large peninsula extending into the Gulf of Fonseca. The summit cone of Cosiguina volcano contains a 2.4 x 2 km wide caldera, 500 m deep with a lake.
2002 Earthquake Swarm
An earthquake swarm occurred near the volcano in September 2002.
This was the first seismic unrest at the volcano in 27 years. The
largest earthquake magnitude 3.9 occurred on 9th September. The
earthquakes were volcano-tectonic, caused by an intrusion of magma.
1951 Earthquakes
On 2nd august 1951 a series of strong earthquakes produced a 200 m
long crack near Cosigüina that ejected large amounts of water,
causing a flood.
1835 Eruption
The eruption of Cosigüina in 1835 was paroxysmal with ash falling on
Mexico, Costa Rica and Jamaica. The eruption was heard in Jamaica
and Colombia. The sun was blacked out for a radius of more than 150
km. The lapilli sized scoria fell 35 km from the volcano. Volume of
ejected material was less than 10 cubic km.
Further reading
Longpré, Marc‐Antoine, et al. "Sulfur budget and global climate impact of the AD 1835 eruption of Cosigüina volcano, Nicaragua." Geophysical Research Letters 41.19 (2014): 6667-6675.
Hradecký, P. and Rapprich, V., 2008. Historical tephra-stratigraphy of the Cosigüina volcano (Western Nicaragua). Revista Geológica de América Central.
Galindo, D.J., 1835. On the Eruption of the Volcano of Cosigüina, in Nicaragua, 17th January, 1835. Journal of the Royal Geographical Society of London, pp.387-392.
Cosigüina Volcano Eruptions
1859, 1852, 1835, 1809, 1709?, 1609?