Earthquake "swarm" continues between Kilauea and Mauna Loa - Hawaii News Now - KGMB and KHNL

Earthquake "swarm" continues on Big Island

4.3 quake at 3:52 a.m. Friday morning 4.3 quake at 3:52 a.m. Friday morning

BIG ISLAND (HawaiiNewsNow) - The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) has recorded more than 100 earthquakes in a swarm that began around 1:17 a.m. on Wednesday, February 22.

 The earthquakes are located about three miles north-northwest of Kilauea volcano's summit, near Namakanipaio in Hawaii Volcanoes National Park, at depths of 1–3 miles.

The largest earthquakes of the ongoing swarm have been a magnitude-4.1 quake at 9:02 p.m. last night and a magnitude-4.3 quake at 3:52 a.m. this morning.

These earthquakes were widely felt on the Island of Hawai‘i.  As of 9:00 a.m. Friday, the USGS "Did you feel it?" Web site had received 74 felt reports for the 9:02 p.m. earthquake and more than 60 felt reports for the 3:52 a.m. event.

The initial magnitude of the 9:02 p.m. earthquake was estimated at 4.1 by HVO's automated software system, but then increased to magnitude-4.3. After close review by HVO seismic analysts this morning, the earthquake's magnitude has been calculated to be 4.1.  

The effects of the early morning magnitude-4.3 earthquake were evident at the Hawaiian Volcano Observatory building, which is located less than 2.5 miles from the swarm's center.  HVO staff noticed that a few books and other items had fallen off shelves and some small ceiling fixtures were dislodged.  Several residents of the Volcano Golf Course subdivision, located about two miles from the earthquake epicenter, also reported items falling from shelves, causing some minor breakage.  

As of Friday morning, the seismic swarm has also included three earthquakes with magnitudes between 3.0 and 3.9, and 25 earthquakes with magnitudes of 2.0 to 2.9.  The magnitudes of another 88 located earthquakes are between 1.0 and 1.9.

The earthquake swarm is located at the north end of the Ka‘oiki Pali, near the boundary between Mauna Loa and Kilauea volcanoes. This area has experienced previous seismic swarms in 1990, 1993, 1997, and 2006, each of which lasted from 1 day to several weeks.

According to Jim Kauahikaua, HVO's Scientist-in-Charge, it's likely that high rates of seismicity could continue in this area for several days.  He added that the earthquake swarm has not caused any obvious changes in Kilauea's magma plumbing system or ongoing eruptions, but that the magnitude-4.3 earthquake did cause a small rockfall in the active vent located within Halema‘uma‘u Crater at the summit of Kilauea.

Related Stories:

4.4 magnitude quake strikes Big Island, no tsunami generated

Earthquake "swarm" hits the Big Island

Copyright 2012 Hawaii News Now. All rights reserved.

  • Hawaii News Now headlinesNewsMore>>

  • US soldier killed in battle with IS in Afghanistan

    US soldier killed in battle with IS in Afghanistan

    Thursday, August 17 2017 9:29 AM EDT2017-08-17 13:29:13 GMT
    Friday, August 18 2017 3:11 AM EDT2017-08-18 07:11:49 GMT
    US military says American soldier killed, several wounded in battle with Islamic State militants in eastern Afghanistan.More >>
    US military says American soldier killed, several wounded in battle with Islamic State militants in eastern Afghanistan.More >>
  • US: War would be 'horrific' but NKorea nukes 'unimaginable'

    US: War would be 'horrific' but NKorea nukes 'unimaginable'

    Thursday, August 17 2017 2:38 AM EDT2017-08-17 06:38:58 GMT
    Friday, August 18 2017 3:11 AM EDT2017-08-18 07:11:47 GMT

    The chairman of the U.S. Joint Chiefs of Staff told reporters that President Donald Trump directly has "told us to develop credible viable military options and that's exactly what we're doing."

    More >>

    The chairman of the U.S. Joint Chiefs of Staff told reporters that President Donald Trump directly has "told us to develop credible viable military options and that's exactly what we're doing."

    More >>
  • City modifying Chinatown curb extensions after negative community feedback

    City modifying Chinatown curb extensions after negative community feedback

    Friday, August 18 2017 3:11 AM EDT2017-08-18 07:11:46 GMT
    (Image: Hawaii News Now)(Image: Hawaii News Now)

    After community outcry from unhappy residents and business owners, the city is scaling back the curb extensions in Chinatown. 

    More >>

    After community outcry from unhappy residents and business owners, the city is scaling back the curb extensions in Chinatown. 

    More >>
Powered by Frankly