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M6.2* Earthquake Rattles Hawaii Island

10:01 PM · Oct 10, 2021

A magnitude 6.2* earthquake occurred just west Lōʻihi Seamount of at 11:48am HST at a depth of 32.9km. The earthquake's depth and location indicate it likely is related to lithospheric flexure, as the weight of the island depresses on the crust of the earth. This earthquake is similar to the magnitude-6.7 Kīholo Bay and 6.1 Māhukona earthquakes on October 15, 2006, and does not change the eruption status of Kilauea or Mauna Loa. No Tsunami threat is expected. *EDIT: Earthquake has been revised to a M6.2 and depth moved from 17.1km down to 32.9km. A M4.1 aftershock at a depth of 32.9km occurred at 11:53am. If you felt the M6.2 earthquake you can report it to USGS here: https://earthquake.usgs.gov/earthquakes/eventpage/pt21283001/tellus Information Statement from USGS-HVO: "The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded an offshore magnitude-6.2 earthquake southwest the Island of Hawai‘i on Sunday, October 10, at 11:48 a.m., HST. The earthquake was centered about 27 km (17 miles) south-southeast of Nāʻālehu at a depth of 35 km (22 mi). A map showing its location is posted on the HVO website at http://volcanoes.usgs.gov/hvo/earthquakes/. More details are available at the National Earthquake Information Center website at  https://earthquake.usgs.gov/earthquakes/eventpage/hv72748782/. A magnitude-4.3 aftershock occurred at 11:53 a.m., about 5 km (3 miles) north of the magnitude-6.2 earthquake at a depth of 36 km (22 miles). Two smaller aftershocks followed theses quakes and other aftershocks are possible and could be felt. Strong shaking, with a maximum Intensity of VI, has been reported across the Island of Hawai‘i, and throughout the Hawaiian Islands. At that intensity, very slight damage to buildings or structures may have occurred. The USGS "Did you feel it?" service (http://earthquake.usgs.gov/dyfi/) received over 1300 felt reports within one hour of the earthquake. The depth, location, and recorded seismic waves of the earthquake suggest a source due to bending of the oceanic plate from the weight of the Hawaiian island chain, a common source for earthquakes in this area. According to HVO Scientist-in-Charge, Ken Hon, the earthquake had no observable impact on Mauna Loa and Kīlauea volcanoes. “Webcams and other data streams show no impact on the ongoing eruption at Kīlauea except for a few minor rockfalls reported within Halemaʻumaʻu crater. Please be aware that other aftershocks are possible and may be felt. HVO continues to monitor Hawaiian volcanoes for any changes. The Alert Levels/Color Codes remain at WATCH/ORANGE for Kīlauea and ADVISORY/YELLOW for Mauna Loa at this time.”"

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Yup, felt it in Hilo. I’m on the 5th floor of the Grand Naniloa Hotel, and I was napping then was jolted awake.

Oct 10, 2021

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Oregon is part of The Ring Of Fire, also known as the Circum-Pacific Belt. Oregon lies on the northeast edge where the Juan de Fuca plate is sliding under the North American plate. This area is known as the Cascadia Subduction Zone (CSZ) and it has the potential for producing exceptionally strong earthquakes. Scientists seem to think the plates are 'stuck' together but will eventually release that pressure that has been building up in a mega thrust event. The last time that happened was around 1700 and caused the coast to drop 20 feet in almost an instant. It also caused a massive Tsunami.

Oct 16, 2021

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feeling the waves transmit through the building was quite fascinating. Id guess-timate that I could feel the shock waves for a good 20+ seconds once I woke up.

Oct 10, 2021

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ya, normally I miss them. Felt this one

Oct 10, 2021

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Dane, this one made waves in my coffee mug. It was really hard to miss.

Oct 10, 2021

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My daughter moved to So Cal after going to college in Oregon and when I asked her about the anticipation of earthquakes in So Cal she replied "Mom, I grew up in Hilo". We used to have earthquakes fairly often here.

Oct 10, 2021

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Indeed. Born, raised and live in So Cal so quakes are a part of my life. Flew into Hilo last night to spend a week enjoying the volcano, and surprised by the other geological experience. Big Island never disappoints!

Oct 10, 2021

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House was shakeing in kona, stuff fell.

Oct 10, 2021

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