The Tomini cluster is named for the Gulf of Tomini, between the northern
and eastern peninsulas of the island of Sulawesi, Indonesia. Most of the
earthquakes are on or near the several portions of Sulawesi that define
the Gulf. The cluster contains the 7.5 Mw tsunamigenic earthquake of
September 28, 2018 that heavily damaged the port city of Palu, and five
other events with magnitude 6.0 or greater. The cluster is larger than
most in area, ~400 km across, in order to be able to include a number of
events whose hypocenters could not otherwise have been calibrated. All
events are well-recorded at teleseismic distances and all events have
depth control, from near-source and local distance readings, teleseismic
depth phases and waveform modeling.
