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Volcano, Storm, and News Updates for the Big Island of Hawaii.

Small Seismic Swarm on Mauna Loa Starts Early This Morning - USGS Statement

8:49 PM · Sep 23, 2022

USGS-HVO: "A small seismic swarm is ongoing beneath the summit of Mauna Loa volcano. Since 2 a.m. HST on 09/23/2022, the U.S. Geological Survey’s Hawaiian Volcano Observatory has recorded over 38 earthquakes beneath the summit caldera region with most earthquakes in a cluster about 3.1 mi (5 km) wide and -1.2 to 0.6 mi (-2 to 1 km) below the surface. These earthquakes may result from changes in the magma storage system and/or may be part of normal re-adjustments of the volcano due to changing stresses within it. HVO continues to monitor Hawaiian volcanoes for any changes." "Seismic activity beneath Mauna Loa has been gradually increasing over the past two months. Small earthquake swarms are considered a normal part of this increase in activity. Currently there are no indications that magma is moving toward the surface and other monitoring systems are displaying normal behavior. Levels of seismicity and deformation remain below those recorded during the winter of 2021. HVO will continue to closely monitor this activity and report any significant changes." ~ HVO Scientist-in-Charge Ken Hon