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USGS Kīlauea Update Released, M3.7 Earthquake On The South Flank at 2:16pm

12:36 AM · Aug 30, 2021

EDIT: EQ revised from a M3.8 to a M3.7. At 2:16pm on August 29th there was a preliminary magnitude 3.7 earthquake on Kilauea's southern flank, south of Napau, at a depth of 7.5km. The earthquake's depth and location on the East Rift Zone suggest its association with movement of the South Flank. If you felt the quake you can report it to USGS here: https://earthquake.usgs.gov/earthquakes/eventpage/hv72680192/tellus Prior to the M3.7 earthquake, the USGS Hawaiian Volcano Observatory posted a new update on Kilauea. Text Available below. ---- USGS HVO Kīlauea Status Report "Ground deformation in Kīlauea’s south summit region continues, though at a rate slightly lower than the rates seen in the first intrusive pulse spanning August 23-25. In contrast, current earthquake activity remains low compared to the earlier pulses of this intrusive activity. The East Rift Zone remains quiet.  Activity Summary: Kīlauea volcano is not erupting. However, intrusive activity that began on August 23 continues south of Kīlauea caldera. Ground deformation in Kīlauea’s south summit region continues, though at a rate slightly lower than the rates seen in the first intrusive pulse spanning August 23-25. In contrast, current earthquake activity remains low compared to the earlier pulses of this intrusive activity. The East Rift Zone remains quiet.  Observations: The rate of ground deformation beneath the south part of Kīlauea summit region, within Hawaiʻi Volcanoes National Park, decreased slightly on the evening of August 28. The current rate is slightly lower than the  rates seen in the first intrusive pulse spanning August 23-25. These observations suggest that magma is continuing to be supplied to the ongoing intrusion.  Over the past 24 hours, approximately 95 earthquakes were recorded at Kīlauea summit and south of Kīlauea caldera. Most of the earthquakes were less than magnitude 2 and occurred approximately 1-4 km (0.6-2.5 mi) below the surface. These small earthquakes have occurred at up to 7 detected earthquakes per hour. These earthquake rates are significantly lower than the rates observed earlier this week.  At the time of this statement, activity continues but there is no indication of upward migration of earthquakes toward the surface or change in deformation that would indicate shallowing of the source intrusive activity. Accordingly, Kīlauea’s Volcano Alert Level and Aviation Color Code remain at ADVISORY/YELLOW.  The Hawaiian Volcano Observatory (HVO) continues to closely monitor Kīlauea for changes in activity. HVO will continue to issue Kīlauea status reports and additional messages as needed. "

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