Mauna Loa volcano (Hawaii, United States): slightly elevated seismicity

Thu, 5 May 2022, 12:05

12:05 PM | BY: LEANDRA

Mauna Loa earthquakes over the past week. Photo Credit: USGS.

During the past week, HVO seismometers recorded approximately 62 small-magnitude (below M3.0) earthquakes below the summit and upper-elevation flanks of Mauna Loa. The majority of these earthquakes occurred at shallow depths less than 15 kilometers (9 miles) below sea level.

Global Positioning System (GPS) measurements show low rates of deformation in the volcano's summit region continuing through the past week.

Concentrations of sulfur dioxide (SO2), hydrogen sulfide (H2S), and carbon dioxide (CO2), as well as fumarole temperatures, remain stable at both the summit and at Sulphur Cone on the upper Southwest Rift Zone.

All news about: Maunaloa volcano
Information about: Maunaloa volcano

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HVO Weekly Update

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Fri, 16 Apr 2021, 18:20

Maunaloa volcano (Hawaiʻi): Swelling slowly continues, no significant change

This InSAR interferogram shows the overall inflation of Mauna Loa’s summit that occurred from November 2020 to March 2021. It also shows several fringes (color cycles) consistent with subsidence inside Moku‘āweoweo caldera and related to a shallow earthquake that was recorded on March 6, 2021. The red circles show the locations of earthquakes associated with that event as determined by HVO’s seismic network. (Image: USGS-HVO)

Unlike her neighbor Kīlauea to the south, Maunaloa is not erupting, and yet has been arguably more visible in the mainstream news this past month. ... Read all

Wed, 31 Mar 2021, 10:59

Mauna Loa volcano (Big Island, Hawaii): ongoing seismic swarm

Upper part of Mauna Loa SW rift zone (image: HVO)

Another series of a seismic swarm occurred beneath the northwest flank of volcano's summit as the Hawaiian Volcano Observatory (HVO) noted. ... Read all

Fri, 19 Mar 2021, 08:33

Mauna Loa volcano (Big Island, Hawaii): seismic swarm

The Hawaiian Volcano Observatory (HVO) reported that a swarm of small earthquakes occurred at 15:46 local time yesterday beneath the southeastern flank of Mauna Loa volcano and northwestern summit of Kilauea volcano at zone known as upper Ka'ōiki. ... Read all

Thu, 11 Mar 2021, 07:34

Mauna Loa volcano (Big Island, Hawaii): earthquake beneath SE flank

Red arrow shows the location of the earthquake M 4.2 yesterday; red frame in the upper right corner of image shows magnitude, depth and date/time of the earthquake (image: HVO)

Seismic network of the Hawaiian Volcano Observatory (HVO) detected a volcano-tectonic earthquake with magnitude M 4.2 at approx. 26 km (16 miles) km depth beneath the southeast flank at 14:21 local time yesterday. The earthquake was located 17 km (11 mile) north-northeast of Pāhala in the vicinity of the Kaʻōiki Pali. ... Read all

Fri, 18 Sep 2020, 07:33

Mauna Loa volcano (Big Island, Hawaii): weekly volcanic activity report 10-17 Sep 2020

Middle part of the volcano´s Southwest Rift Zone (image: HVO)

During the past week the Hawaiian Volcano Observatory (HVO) recorded 67 small-magnitude earthquakes on the volcano's summit and upper-elevation flanks. Most of these earthquakes occurred at shallow depths of less than 8 km (~5 miles) below ground level. ... Read all

Thu, 27 Aug 2020, 07:40

Mauna Loa volcano (Big Island, Hawaii): activity remains unchanged

Thermal image at Mauna Loa at northwest rim captured yesterday (image: HVO)

During the past week the Hawaiian Volcano Observatory (HVO) recorded 144 small-magnitude earthquakes below the volcano's summit and upper-elevation flanks. Most of these earthquakes occurred at shallow depths of less than 8 km (~5 miles) below ground level. ... Read all

Mauna Loa volcano (Hawaii, United States): slightly elevated seismicity

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