Earthquakes beneath southern part of Kīlauea caldera ramp back up

The major intrusive event that has been ongoing beneath the southern part of the Kīlauea caldera extending southwest to the Koaʻe fault zone appears to ramping back up.

According to Hawaiian Volcano Observatory, an increase in earthquakes, from 23 per day on Monday, to 136 were recorded in the past 24 hours. These earthquakes were at depths 0.6 to 3 miles beneath the surface.

No unusual activity has been noted along the East Rift Zone or Southwest Rift Zone.

Currently, the Uēkahuna summit tiltmeter located north of the caldera recorded very slight inflation over the past 24 hours, in a northeast direction. The Sand Hill tiltmeter, located just south of the caldera, is showing an inflationary tilt trend, in the northwest direction. Sulfur dioxide emission rates remain low and were measured at a rate of about 100 tonnes per day on Oct. 6. Other monitoring data streams, including webcam views, do not show any significant changes.

Hawaiian Volcano Observatory continues to monitor the summit region of Kīlauea volcano closely. For a discussion of Kīlauea hazards, see https://www.usgs.gov/observatories/hawaiian-volcano-observatory/hazards.