USGS HVO Information Statement — Magnitude-4.6 earthquake east-northeast of Pāhala, Island of Hawai‘i

Release Date:

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.6 earthquake located east-northeast of Pāhala on Tuesday, October 5, at 8:37 p.m., HST.

KILAUEA VOLCANO (VNUM #332010)
19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

KĪLAUEA INFORMATION STATEMENT

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.6 earthquake located east-northeast of Pāhala on Tuesday, October 5, at 8:37 p.m., HST.

The earthquake was centered about 8 km (5 miles) east-northeast of Pāhala, at a depth of 33 km (20 miles). A map showing its location is posted on the HVO website at http://volcanoes.usgs.gov/hvo/earthquakes/. More details are available at the National Earthquake Information Center website at  https://earthquake.usgs.gov/earthquakes/eventpage/hv72742352.

Light shaking, with maximum Intensity of IV on the Modified Mercalli Intensity Scale, has been reported across parts of the Island of Hawai‘i. At that intensity, significant damage to buildings or structures is not expected. The USGS "Did you feel it?" service (http://earthquake.usgs.gov/dyfi/) received over 210 felt reports within the first hour of the earthquake.

According to HVO Scientist-in-Charge, Ken Hon, the earthquake had no observable impact on Mauna Loa and Kīlauea volcanoes. “This earthquake is part of the ongoing seismic swarm under the Pāhala area, which started in August 2019. Webcams and other data streams show no impact on the ongoing eruption at Kīlauea. Please be aware that aftershocks are possible and may be felt. HVO continues to monitor Hawaiian volcanoes for any changes. The Alert Levels/Color Codes remain at WATCH/ORANGE for Kīlauea and ADVISORY/YELLOW for Mauna Loa at this time.”

Earthquakes in this swarm occur beneath Kīlauea's lower Southwest Rift Zone, beneath the town of Pāhala and in an area extending about 10 km (6 miles) offshore. Most of the earthquakes occur at depths of 25–40 km (15–25 miles). Earthquakes in this region have been observed at least as far back as the 1960s.

For information on recent earthquakes in Hawaii and eruption updates, visit the USGS Hawaiian Volcano Observatory website at http://volcanoes.usgs.gov/hvo/earthquakes/.

More Information:
Kīlauea activity summary also available by phone: (808) 967-8862
Kīlauea webcam images: https://www.usgs.gov/volcanoes/kilauea/webcams
Kīlauea photos/video: https://www.usgs.gov/volcanoes/kilauea/photo-video-chronology
Kīlauea lava-flow maps: https://www.usgs.gov/volcanoes/kilauea/maps
Kīlauea FAQs: https://www.usgs.gov/volcanoes/kilauea/faqs

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Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hawaiian-volcano-observatory/hazards

Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hawaiian-volcano-observatory/earthquakes

Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/natural-hazards/volcano-hazards/about-alert-levels

CONTACT INFORMATION:

askHVO@usgs.gov

The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi.