Volcanic mountains

Volcanic seamount in Hawaii comes to life as two dozen earthquakes recorded in 24 hours

Authorities have reported that a volcanic seamount off the coast of Hawaii is beginning to rumble.

22 miles off the southeast coast of Hawaii lies the active underwater volcano known as Kamaehuakanaloa Seamount.

3,200 feet or so is below sea level at its summit. Large landforms called seamounts rise from the ocean floor but stop short of the surface of the water.

Around 2 a.m. on July 16, the Hawaiian Volcano Observatory noticed an increase in seismic activity at the volcano.

Two dozen quakes ranging in magnitude from 1.8 to 3.0 were recorded between 1:30 a.m. and 6 a.m. just 24 hours later, according to a statement from the observatory.

Volcanic Seamount in Hawaii

(Photo: Marc Szeglat/Unsplash)


According to the observatory, pulses of seismic energy that occur every 15 to 20 seconds were used to measure earthquake shaking, in accordance with NewsBreak.

At the time of the announcement, activity was continuing and 24 earthquakes had already been recorded.

Nearby structures were not damaged, according to the Hawaii Volcano Observatory.

During the tremors, “no shaking” was felt.

Off the island that is home to Klauea, one of the most dangerous volcanoes in the United States, and Mauna Loa, Earth’s largest volcano, is Kamaehuakanaloa Seamount.

Hawaiian Volcano Observatory scientist Ken Hon said in the statement that the increase in activity does not now indicate a likely eruption.

According to Hon, this seismic activity is likely a consequence of the movement of magma under the Kamaehuakanaloa seamount and does not currently indicate that it could lead to an eruption.

Hawaiian Volcano Observatory will issue an additional notification if the swarm expands or changes drastically.

An eruption from Kamaehuakanaloa would not endanger the island of Hawaii due to the volcano’s deep ocean location and the nature of Hawaiian eruptions.

The activity of the Mauna Loa and Klauea volcanoes is not affected by this seismic swarm.

Since the early 1950s, Kama’ehuakanaloa has been the source of seismic activity. There, between July and August 1996, the largest earthquake ever recorded took place.

More than 4,000 earthquakes were reported during this period. 95 of them had a magnitude between 4.0 and 4.9.

Nearly 20 of the 100 documented seamount earthquakes in 2020 had magnitudes of 3.0 to 3.9.

There are no monitoring devices atop the volcano since it sits hundreds of feet below sea level, but ground-based seismometers allow scientists to track its activity.

Read also : White Island disaster: story behind horrific volcanic eruption that killed 20 tourists

Underwater volcanoes

At the bottom of the ocean are submerged volcanoes. They have the same explosive power as volcanoes on earth, according to Royal museums.

Submarine volcanoes, sometimes called seamounts (seamounts), can be just as violent and in some cases larger than those on land.

According to some oceanographers, a million volcanoes, nearly 750 times more than there are on earth, would exist on the bottom of the Pacific Ocean alone.

Wherever magma rises to the bottom of the sea and explodes, there are seamounts. New seabed material is created by lava or magma that has erupted and solidified.

More lava is released from mid-ocean ridge volcanoes than from all other volcanoes combined.

A volcanic island is a seamount that has grown large enough to break through the surface of the ocean.

The Hawaiian Islands are a perfect illustration of this process; in fact, a juvenile seamount known as Loihi, which is immediately southeast of Hawaii, has reached a height of 3,300 feet (1,000 meters), expected to reach the surface in 50,000 years.

Seamounts create a variety of features in addition to creating cool ocean crust.

“Hydrothermal vents” are hot springs that occur where salt water and seafloor magma or lava eruptions interact.

These features were first discovered in 1979, despite the fact that they are now considered crucial to ocean dynamics.

Over 200 vent sites on the seabed have been discovered since then.

Related article: Philippines’ Taal volcano eruption forces thousands to flee

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