Volcano Watch: What’s that (seismic) noise?

  • April 1 spectrogram recorded at station STCD, located near Puʻu ʻOʻo on Kilauea's East Rift Zone. USGS graphic/Special to West Hawaii Today

  • March 19 spectrogram recorded at station RCOD, located on Mauna Loa's Southwest Rift Zone. USGS graphic/Special to West Hawaii Today

  • April 1 spectrogram recorded at station WRM, located near Halema‘uma‘u at Kilauea’s summit. (USGS graphics/Special to West Hawaii Today)

  • March 25 spectrogram recorded at station NPOC, located near Pu‘u ‘O‘o on Kilauea’s East Rift Zone.

The U.S. Geological Survey’s Hawaiian Volcano Observatory uses dozens of seismometers to locate individual earthquakes and identify signals that are related to faulting and magma movement within our volcanoes.