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Kilauea Explosion and Earthquake Update
What follows is a transcript of the above video article.
Scientists continue to monitor the eruption of Kīlauea volcano on the island of Hawaii.
The US Geological Survey’s Hawaiian Volcano Observatory says activity is stable, with lava from the western vault continuing to supply the summit crater with lava.
All activity is confined to the summit, with no signs of the eruption migrating down the rift.
The strength of the eruption appears to be related to the sustained inflation and deflationary cycles recorded at the top. During times of inflation, volcanic activity is most intense.
As of the morning of February 8, the active western portion of the lava lake was about 215 meters, or 705 feet, deep, with the eastern portion of the lava lake hardening at the surface.
Sulfur dioxide emission rates remain high, with the most recent measurements at around 2,200 tons / day.
Seismicity is also high but stable. After a 4.1 magnitude earthquake shook eastern Hawaii, a week ago … scientists wrote about earthquakes in her weekly article, Volcano Watch.
The southern flank of Kolaouia Island was the site of five earthquakes of magnitude 4.0 or more in the past year.
HVO says these earthquakes occur in response to the sudden motion of the separation fault – found at the interface between Kīlauea volcano and the ocean floor – that travels southeast over the oceanic crust. The sudden movement releases pressure on the south side caused by the accumulation of magma below the surface.
Higher rates of movement on the fault are expected, following the large 6.9-magnitude earthquake that occurred in May 2018 during the eruption of Kilauea volcano in the Lower East Rift Zone.
These and other Hawaiian Island earthquakes were discussed in more detail during the recent Volcano Awareness Month presentation.
PETER DOTRAY, USGS HVO: “A very clear indication that they are not migrating across the rift … This is really the southern flank, sort of event that causes separation. Then here, if we kind of focus and look at the Lower East Rift, you’ll see that it is very quiet. Really known about rendition activity out there. Few micro seismic events. A couple of medium sized events. We’ve had quite a few physical reports, but it’s very small and very quiet. And here you can see we have this histogram, so these are weekly numbers. It remained consistent. Pretty much until recent activity. Since the summit of Kīlauea is quiet as it is, it is mostly the south flank activity that we have been seeing for the past month. Then finally, the earthquakes in Pāhala are attracting a lot of attention, including ours. We focus on this area because the activity It has already rebounded. But the activity stays at these depths of 25 to 40 km. You see some surface activities here, but it’s a very separate activity. You don’t really see any migration or shallow under Pāhala, it’s really just these profound events, which previous studies have linked By a kind of deep, pure magma Several, possibly from where you come to the volcanic edifice into which you enter the Big Island. From the upper mantle region type to the crust. You can read more about it on the Volcano Watch that was written in 2019. It talks a little more about that. But again, this activity has been noticed for decades. It improved in August 2019, but has remained steady since. Thank you so much. If you have questions, please feel free to email and we will get back to you as soon as possible. And stay safe. Thank you so much.”
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