Volcano Watch: Seismologists shed light on processes occurring deep beneath Pahala

  • USGS graphic The location of permanent and temporary seismic instruments deployed across the southeast part of the Island of Hawaii. Shaded white areas show dense regions of earthquakes interpreted as the Pahala sill complex. Dashed white box outlines a region of sparsely spaced volcano-tectonic earthquakes that lie between the Kilauea summit and Pahala.

Pahala, a town located in the southeast part of the Island of Hawaii, lies above the state’s most seismically active area. In the last 5 years, the average weekly number of earthquakes has increased from about 60 to 600 earthquakes per week.