INETER reported that a seismic swarm near Apoyeque started at 1627 on 6 September in an area between the volcano and Managua (less than 10 km SW).
At the time of the report, almost four hours after the start of the event, 17 earthquakes had been detected; three events were M 2.3-3.7, at depths ranging from 2.8 to 6 km. Within the last five years, Instituto Nicaragüense de Estudios Territoriales (INETER) reported at least two seismic swarms at Apoyeque, and between the Chiltepe Peninsula and the city of Managua (~15 km SE) (figure 1).
INETER reported a swarm that began at 1727 local time on 6 September 2012.
The National Seismic Network detected and located the series of earthquakes between Apoyeque and the Nejapa-Miraflores fault (figure 1).
Synonyms of features appear indented below the primary name.
In some cases additional feature type, elevation, or location details are provided.
None of these earthquakes were reportedly felt by local populations and the event was assigned an Intensity II. Avellán and others (2012) described the polygenetic Apoyeque volcano as belonging to the Nejapa volcanic field (figure 1), which is bound by the Nejapa fault system.Apoyeque remains in repose without documented historical eruptions.Tephrochronology (the study of ash layers, in this case including radiometric dating) indicates the most recent eruption here was large and took place about 50 BC (? That tephra deposit has an estimated 4 km Within the last five years, Instituto Nicaragüense de Estudios Territoriales (INETER) reported at least two seismic swarms at Apoyeque, and between the Chiltepe Peninsula and the city of Managua (~15 km SE) (figure 1).The earthquake was felt by the population in Sandino City, ~5 km W of the earthquakes.The seismic swarm lasted until 2 October 2009; the total number of detected earthquakes was not disclosed.