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the underground effects of earthquakes and volcanoes

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the underground effects of earthquakes and volcanoes

the time variation of seismic velocity relative to the averaged pre-earthquake value are displayed. each panel shows the central date within the 30-day window: (a) 8 march, (b) 1 may, (c) 1 june, and (d) 1 october 2016. warm colors indicate regions where seismic velocity was decreased. during the 2016 earthquake, seismic velocity around the seismogenic hinagu-futagawa fault system and mount aso decreased greatly. cold colors indicate regions where seismic velocity wasincreased. seismic velocity at mount aso recovered rapidly and wasfaster than the pre-earthquake velocity after the eruption. the datedescribed above shows the central date within the 30-day window.yellow or white dots are hi-net stations. credit: science advancesmost of what...