Geologists build preliminary account of Tonga eruption

"This is definitely, without a doubt, the largest eruption since Mt. Pinatubo in 1991," said corresponding author Scruggs, who studies magma mixing and eruption triggering mechanisms, and recently completed her doctorate at UC Santa Barbara. She compared January's event to the 1883 eruption of Krakatoa, which was heard 3,000 miles away.

Using a variety of data sets, the team calculated that the January 15 event began at 5:02 p.m. local time . The U.S. Geological Survey recorded a seismic event around 13 minutes later at the vent location. The first two hours of the eruption were particularly violent, with activity fading after about 12 hours.

On January 14, 2022 an explosion from the main vent razed this connection, sinking the vent beneath the ocean's surface."Had that land bridge not been taken out, the January 15 eruption might have behaved just like the day before because it would not have had that excess seawater," Scruggs remarked.Same volcano, one day's difference: On Friday the vent was above the water, and by Saturday it was below."That made all of the difference in the world," Scruggs said.

The shockwave from Hunga Tonga-Hunga Ha’apai traveled around the world. Credit: Tim Schmit, NOAA/NESDIS/ASPB HTHH has experienced similarly violent eruptions in the past. A recent paper by researchers at the University of Otago, New Zealand revealed that a large eruption destroyed the caldera at the summit of the undersea volcano about 1,000 years ago. And similar volcanoes could well erupt in the same manner. Consider Kick 'em Jenny, another submarine volcano whose main vent is a mere 150 meters underwater. It's located just 8 km north of the island of Grenada.

Hello world, professor! this is my experiment on wave interference of light. The wave interference of light is just an illusion of the combination of two light beams on the screen. On the way to the screen. Light forms straight lines.

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