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Kīlauea 2018 events mark a watershed for volcano science

Detailed Description

These two plots show summit tilt (ground deformation) and seismicity (earthquake counts) on Kīlauea Volcano between July 15 and August 5, 2018. A regular pattern emerged in which seismicity gradually increased over 1-3 days (bottom), until the caldera floor suddenly dropped several meters (yards) in a matter of seconds. The sharp upward steps on the tilt plot (top) reflect when these summit collapses occurred, causing the ground outside the collapsing area to rebound. USGS data plots.


Public Domain.