Skip to main content
U.S. flag

An official website of the United States government

USGS HVO Press Release—Magnitude-4.3 earthquake under Kīlauea Volcano's south flank

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.3 earthquake located beneath Kīlauea Volcano's south flank on Friday, July 3, at 2:19 p.m., HST.

The earthquake was centered about 5.6 km (3.5 miles) south of Pu‘u ‘Ō‘ō, about 1.7 km (1 mile) north of last night's M4.6 earthquake, at approximately 7.1 km depth (4.4 miles). A map showing its location is posted on the HVO website at More details are available at the National Earthquake Information Center website at

Weak shaking, with maximum Intensity of III on the Modified Mercalli Intensity Scale, has been reported across the Island of Hawai‘i. At that intensity, significant damage to buildings or structures is not expected. The USGS "Did you feel it?" service ( received over 220 felt reports within the first hour of the earthquake.

According to HVO seismologist Ashton Flinders, the earthquake had no apparent effect on Kīlauea or Mauna Loa volcanoes. "We do not see any immediate changes in activity at Kīlauea or Mauna Loa as a result of either this earthquake or the M4.6 earthquake last night. It is not uncommon for aftershocks like these to happen in relatively short succession. Further aftershocks remain possible and may be felt." HVO continues to monitor Kīlauea and other Hawaiian volcanoes for any changes.

Aftershocks are the result of crustal settling from larger earthquakes, such as the M6.9 that occurred on May 4, 2018. The location, depth, and waveforms recorded as part of today's earthquake are consistent with slip along this south flank fault. While most earthquakes under Kīlauea's south flank are caused by abrupt motion of the volcano to the southeast over the oceanic crust, some patches of the fault that did not slip during the larger earthquakes are primed to slip as subsequent aftershocks.

According to the Pacific Tsunami Warning Center, there is no tsunami threat from this earthquake.

For information on recent earthquakes in Hawaii and eruption updates, visit the USGS Hawaiian Volcano Observatory website at


Daily updates about Kīlauea's ongoing eruptions, recent images and videos of summit and East Rift Zone volcanic activity, maps, and data about recent earthquakes in Hawaii are posted on the HVO website at

USGS provides science for a changing world. Visit, and follow us on Twitter @USGS and our other social media channels.

Subscribe to our news releases via e-mailRSS, or Twitter.

Links and contacts within this release are valid at the time of publication.

Get Our News

These items are in the RSS feed format (Really Simple Syndication) based on categories such as topics, locations, and more. You can install and RSS reader browser extension, software, or use a third-party service to receive immediate news updates depending on the feed that you have added. If you click the feed links below, they may look strange because they are simply XML code. An RSS reader can easily read this code and push out a notification to you when something new is posted to our site.