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News
Recent earthquakes under Loihi volcano (Hawai'i)
Monday, Jun 26, 2017
Since late May, the volcano hidden beneath the Pacific south of Big Island has been showing markedly increased seismic activity. Several earthquake swarms were detected under the volcano. ... [more]
Monday, Nov 26, 2012
A magnitude 4.2 earthquake was detected at Loihi volcano on 25 November. We will wait and see if the Hawaiian Volcano Observatory has any more information on this. [more]
 

Loihi volcano

Submarine volcano -975 m / - 3,199 ft
United States, Hawaiian Islands, 18.92°N / -155.27°W
Current status: normal or dormant (1 out of 5) | Reports
Loihi volcano books
Last update: 1 Aug 2019 (earthquake swarm)
Typical eruption style: unspecified
Loihi volcano eruptions: 1996 
TimeMag. / DepthDistanceLocation
Thu, 22 Aug 2019
Thu, 22 Aug 14:33 UTCM 4.1 / 16.9 km20 km57km SSE of Pahala, Hawaii (USA)
Sun, 18 Aug 2019
Sun, 18 Aug 09:04 UTCM 2.2 / 30.4 km17 km21km SE of Pahala, Hawaii (USA)
Sun, 18 Aug 06:44 UTCM 2.1 / 40.4 km29 km10km SE of Pahala, Hawaii (USA)
Sun, 18 Aug 05:10 UTCM 2.3 / 34.7 km18 km21km SSE of Pahala, Hawaii (USA)
Sat, 17 Aug 2019
Sat, 17 Aug 18:03 UTCM 1.9 / 30.5 km17 km21km SE of Pahala, Hawaii (USA)
View all recent quakes

Background:

Loihi seamount, the youngest volcano of the Hawaiian chain, lies about 35 km off the SE coast of the island of Hawaii. Loihi (which is the Hawaiian word for "long") has an elongated morphology dominated by two curving rift zones extending north and south of the summit. The summit region contains a caldera about 3 x 4 km wide and is dotted with numerous lava cones, the highest of which is about 975 m below the sea surface. The summit platform includes two well-defined pit craters, sediment-free glassy lava, and low-temperature hydrothermal venting. An arcuate chain of small cones on the western edge of the summit extends north and south of the pit craters and merges into the crests of Loihi's prominent rift zones. Deep and shallow seismicity indicate a magmatic plumbing system distinct from that of Kilauea volcano. During 1996, a new pit crater was formed at the summit of the volcano, and lava flows were erupted. Continued volcanism is expected to eventually build a new island at Loihi; time estimates for the summit to reach the sea surface range from roughly 10,000 to 100,000 years.
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Smithsonian / GVP volcano information


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