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Shield volcano 4170 m / 13,681 ft
Big Island, Hawai'i, 19.48°N / -155.61°W
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Volcano news: Mauna Loa volcano (Big Island, Hawaii)

Mauna Loa (Hawai'i): shallow magnitude 4.0 earthquake under summit caldera

Tuesday Sep 06, 2016 14:58 PM | VON: T

M4.0 earthquake under Mauna Loa today
M4.0 earthquake under Mauna Loa today
Earthquake trace on the recording of MLOA station (HVO)
Earthquake trace on the recording of MLOA station (HVO)
A magnitude 4.0 earthquake occurred at 2.4 km depth beneath the summit caldera of the volcano half an hour ago (04:25 am in Hawaii).
Such relatively large quakes under active volcanoes can (but not necessarily must) be precursors of new eruptions if they are being caused by magma pressurizing rock and fracturing it on its way up. Whether this particular quake is in fact caused by magma movements is impossible to know a priori without further analysis.
Mauna Loa is statistically "due" for an eruption (its last having been in 1984) and increased seismic activity and inflation over the past years have indicated an ongoing period of unrest due to gradual magma recharge.
Vorherige Nachrichten
Weekly earthquake rate of Mauna Loa during the past year (HVO)
Monday, Jul 25, 2016
The volcano is not erupting, but continues to show unrest. Deformation and seismic activity remain above long-term background levels. ... [mehr]
Friday, Oct 30, 2015
Seismic unrest continues at the volcano, but at lower levels than during mid-late summer, HVO reports: ... [mehr]
Friday, Sep 18, 2015
The alert level of the world's largest volcano was raised a notch to "ADVISORY", and the Aviation Color code to "YELLOW" becuase shallow earthquakes have recently appeared in increasing numbers under the volcano. There is no sign that the volcano is about to erupt in a very near future, but it could be a medium- or long-term precursor of a next eruption. ... [mehr]
Recent earthquakes under Mauna Loa volcano
Wednesday, Sep 18, 2013
A small earthquake swarm occurred last week under the volcano. During 5-7 September, HVO detected about 350 small earthquakes up to magnitude 2.4 in a tightly clustered area at about 7 km depth west of the summit caldera. Only about 25 were strong enough to be located (map). ... [mehr]
Friday, Jul 05, 2013
Very weak unrest in the form of inflation and seismic activity continues at the largest active volcano of our earth, which has not erupted since 1984. However, this activity is not strong enough to justify a raise of the alert level from green "normal" to yellow "unrest". There is currently no sign that Mauna Loa will erupt any time soon. ... [mehr]

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