Mauna Loa volcano (Big Island, Hawai'i): seismic swarm
dim., 25 sept. 2022, 17:0117:01 PM | AUTEUR : MARTIN
The Hawaiian Volcano Observatory (HVO) reported that a small seismic swarm is occurring beneath the summit of the volcano.
The seismic activity beneath Mauna Loa volcano during 16-23 Sep (image: Hawaii Tracker)
At about 02:00 local time starting on 23 September, the seismic network recorded over 38 earthquakes beneath the summit caldera region with most earthquakes in a cluster about 3.1 mi (5 km) wide and -1.2 to 0.6 mi (-2 to 1 km) below the surface. These earthquakes may result from changes in the magma storage system and/or may be part of normal re-adjustments of the volcano due to changing stresses within it.
According to HVO Scientist-in-Charge Ken Hon, "Seismic activity beneath Mauna Loa has been gradually increasing over the past two months. Small earthquake swarms are considered a normal part of this increase in activity. Currently, there are no indications that magma is moving toward the surface and other monitoring systems are displaying normal behavior. Levels of seismicity and deformation remain below those recorded during the winter of 2021."
Source: Hawaiian Volcano Observatory volcano activity update 25 September 2022
jeu., 5 mai 2022, 12:05
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. ... Read all
ven., 16 avril 2021, 18:20
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