Earthquake Definition and 172 Threads

TL;DR Summary: Tasked to formulate an equation relating piezoelectric effect and seismic waves during earthquakes. Using magnitude and distance attenuation to calculate stress/strain on the piezo system from earthquake energy. Need help checking if the basis and idea are correct

M 7.6 - 209 km SSW of George Town, Cayman Islands 2025-02-08 23:23:14 (UTC) 17.702°N 82.456°W 10.0 km depth https://earthquake.usgs.gov/earthquakes/eventpage/us7000pcdl/executive Nearby locations George Town, George Town, Cayman Islands210.1 km (130.6 mi) NNEPopulation: 29370 Bodden Town...

M 7.0 - 2024 Offshore Cape Mendocino, California Earthquake https://earthquake.usgs.gov/earthquakes/eventpage/nc75095651/executive 2024-12-05 18:44:19 (UTC) 40.370°N 125.025°W 0.6 km depth Tsunami warning for coastal N. California. Quake and after shocks at the junction of the Gorda plate...

M 6.8 - 40 km SSW of Bartolomé Masó, Cuba https://earthquake.usgs.gov/earthquakes/eventpage/us7000nr0v/executive 2024-11-10 16:49:50 (UTC) 19.812°N 77.039°W 14.0 km depth M 5.9 - 35 km S of Bartolomé Masó, Cuba https://earthquake.usgs.gov/earthquakes/eventpage/us7000nr0n/executive 2024-11-10...

M 7.1 - 2024 Hyuganada Sea, Japan Earthquake https://earthquake.usgs.gov/earthquakes/eventpage/us6000nith/executive 2024-08-08 07:42:55 (UTC) 31.719°N 131.527°E 25.0 km depth Interactive Map An aftershock M 5.4 - 7 km WSW of Miyazaki, Japan...

M 6.8 - 18 km ENE of Barcelona, Philippines (was reported initially as M6.7) https://earthquake.usgs.gov/earthquakes/eventpage/us6000nhqc/executive 2024-08-02 22:23:01 (UTC) 8.193°N 126.600°E 25.8 km depth M 6.3 - 36 km E of Barcelona, Philippines...

M 2.9 - 39 km ESE of Sturgeon Bay, Wisconsin https://earthquake.usgs.gov/earthquakes/eventpage/us6000nhkd/executive 2024-08-02 14:18:57 (UTC) 44.683°N 86.928°W 10.9 km depth An unusual but not very significant earthquake. It got the attention of folks in Milwaukee, WI. Lake Michigan had a 2.9...

An unusual place for an earthquake. https://earthquake.usgs.gov/earthquakes/eventpage/us6000n92y/map M 3.4 - 15 km SW of Henderson, New York 2024-06-29 03:45:24 (UTC) 43.759°N 76.331°W 10.0 km depth https://www.yahoo.com/news/earthquake-rocks-upstate-york-usgs-113405947.html

"Such anomalies are known as earthquake precursors, and although researchers are aware of them, it has been difficult to definitively identify a pattern of so-called red flags that could indicate an impending earthquake. This is because of the complexity of precursor interactions and their...

A small earthquake was reported in the Adirondack mountains in northern part of NY State, US. M 2.1 - 11 km WNW of Elizabethtown, New York 2024-05-21 15:23:24 (UTC) 44.274°N 73.716°W 7.6 km depth https://earthquake.usgs.gov/earthquakes/eventpage/us6000n01p/executive...

If for any reason, the moon were forced into a more extreme elliptical orbit to earth where its perigee was much closer to earth and its apogee was much farther, what kind of affects would we expect to see? Also, would the moon's perigee cause more frequent or more severe earthquakes?

Not a terribly strong earthquake, but it is unusual. It is apparently near the Ramapo fault, whih is part of the Appalachian mountain chain as it curves across NJ into NY and CT. Folks noticed it - and of course, many panicked and called 9-1-1. I have not heard of any injuries or building...

M 7.4 - 18 km SSW of Hualien City, Taiwan https://earthquake.usgs.gov/earthquakes/eventpage/us7000m9g4/executive 2024-04-02 23:58:11 (UTC) 23.819°N 121.562°E 34.8 km depth M 6.4 - 11 km NE of Hualien City, Taiwan https://earthquake.usgs.gov/earthquakes/eventpage/us7000m9gc/executive...

An earthquake struck at 4:10 p.m. local time at a depth of 10 kilometers (6 miles), around 42 kilometers (26 miles) northeast of Anamizu in Ishikawa prefecture, according to the United States Geological Survey (USGS). M 7.5 - 42 km NE of Anamizu, Japan...

I discovered a video in which various people discuss what they witnessed that day - including some survivors. At the time, the Pacific Tsunami Warning Center in Hawaii detected a large earthquake, but initially underestimated the magnitude (M 8.0). Furthermore, they had no instrumentation in...

M 5.9 - 37 km WNW of Linxia Chengguanzhen, China https://earthquake.usgs.gov/earthquakes/eventpage/us7000ljvg/region-info 2023-12-18 15:59:30 (UTC) 35.743°N 102.827°E 10.0 km depth https://earthquake.usgs.gov/earthquakes/eventpage/us7000ljvg/executive News agencies report 100 or more people...

M 7.6 - Mindanao, Philippines https://earthquake.usgs.gov/earthquakes/eventpage/us7000lff4/executive 2023-12-02 14:37:03 (UTC) 8.527°N 126.449°E 32.8 km depth Numerous aftershocks in the Mag 4+ to 5+ range. M 6.4 - 47 km NE of Barcelona, Philippines...

M 6.7 - 98 km E of Port-Olry, Vanuatu ( northern Vanuatu ~ 100km E of Santo) 2023-11-22 04:47:33 (UTC) 14.985°S 167.983°E 22.5 km depth from my seismo .....

Cornwall shaken by 2.7 magnitude earthquake https://www.bbc.com/news/articles/c724le759lro That's not a significant earthquake, unless one's house is near the epicenter. Residents in Helston, Penzance and Camborne reported feeling the tremors. Some of my ancestors were from that area, and I...

M 6.7 - 26 km WSW of Burias, Philippines https://earthquake.usgs.gov/earthquakes/eventpage/us6000lp12/executive 2023-11-17 08:14:13 (UTC) 5.587°N 125.051°E 78.0 km depth https://apnews.com/article/philippines-earthquake-mindanao-688f1e3b08854f31e92eaf1fd12e0bcb The earthquake was reported as...

https://www.msn.com/en-us/weather/topstories/rare-5-3-magnitude-earthquake-jolts-west-texas/ar-AA1jBhJ8 M 5.2 - Coalson Draw, Texas https://earthquake.usgs.gov/earthquakes/eventpage/tx2023vxae/executive 2023-11-08 10:27:49 (UTC) 31.622°N 103.982°W 7.4 km depth There was an unusal set of...

M 7.1 - Banda Sea - https://earthquake.usgs.gov/earthquakes/eventpage/us7000l9h4/executive 2023-11-08 04:53:51 (UTC) 6.456°S 129.513°E 10.0 km depth Fairly shallow Aftershocks in the 4-6 M range, but one at M 6.7 - Banda Sea 2023-11-08 13:02:06 (UTC) 6.146°S 129.914°E 10.0 km depth...

https://earthquake.usgs.gov/earthquakes/eventpage/us7000kg30/executive M 7.2 - 98 km S of Sand Point, Alaska 2023-07-16 06:48:22 (UTC) 54.460°N 160.760°W 32.6 km depth There is some speculation that the Mag 7.2 earthquake may be indicative of an imminent eruption of the Shishaldin Volcano...

https://www.chicoer.com/2023/05/11/earthquake-shakes-north-state/ https://earthquake.usgs.gov/earthquakes/map/?extent=40.16313,-121.3076&extent=40.34393,-120.94368&listOnlyShown=true&baseLayer=terrain https://earthquake.usgs.gov/earthquakes/eventpage/nc73886731/executive M 5.5 - 4km SW of East...

M 7.6 - 95 km WNW of Hihifo, Tonga 2023-05-10 16:02:00 (UTC) 15.600°S 174.608°W 210.1 km depth A decent event that maxed out my seismo for some minutes https://www.sydneystormcity.com/seismograms.htm As it will disappear off my seismo in around 20 hours ( from time of writing this) a screen...

Hello : As the news coming from Syria and Turkey about earthquake devastation, is it possible to use ground penetrative radar or sound identification and wave frequency spectrum analysis to locate survivours ? The human sound are in the range of 20 kHz shouldnt we be able to use microphones...

https://earthquake.usgs.gov/earthquakes/eventpage/us7000ir9t/executive M 5.6 - 18 km WSW of Ciranjang-hilir, Indonesia 2022-11-21 06:21:10 (UTC) 6.853°S 107.095°E 10.0 km depth - relatively shallow https://earthquake.usgs.gov/earthquakes/eventpage/us7000ir9t/region-info City of Cianjur had...

M 5.3 - 39 km WSW of Mentone, Texas 2022-11-16 21:32:44 (UTC) 31.634°N 104.005°W 8.3 km depth - relatively shallow https://earthquake.usgs.gov/earthquakes/eventpage/tx2022wmmd/executive Some 90 km (56 mi) SSE of Carlsbad, New Mexico - in an unpopulated area of the Llano Estacado (Staked...

My first attempt was to work with the the difference in arrival times, but that didnt account for the focus to be under the epicenter. So I tried again in combination with the angle between the stations but have not arrived at a clear solution.

M 7.6 - 66 km E of Kainantu, Papua New Guinea https://earthquake.usgs.gov/earthquakes/eventpage/us6000iitd/executive 2022-09-10 23:46:57 (UTC) 6.256°S 146.469°E 90.0 km depth https://www.msn.com/en-us/news/world/earthquake-of-magnitude-7-6-strikes-papua-new-guinea/ar-AA11GO6l

Hello, Recently while familiarizing myself with the rodent menace affecting Fiber optic networks, I came across this rather novel use for the dark, or unused fibers in buried cables. The method apparently holds a lot of promise as well as significant advantages over many current Seismology...

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M 6.0 - 7 km NNW of Thrapsanón, Greece https://earthquake.usgs.gov/earthquakes/eventpage/us7000fes8/executive 2021-09-27 06:17:22 (UTC) 35.252°N 25.260°E 8.7 km depth https://earthquake.usgs.gov/earthquakes/eventpage/us7000fes8/region-info https://www.bbc.com/news/world-europe-58705376...

M 7.0 - Acapulco, Mexico https://earthquake.usgs.gov/earthquakes/eventpage/us7000f93v/executive 2021-09-08 01:47:47 (UTC) 16.982°N 99.773°W 20.0 km depth Waiting to see if it gets upgraded...

Wikipedia article (still rapidly evolving of course) USGS estimates 1000-10,000 deaths as most likely scenario, most likely the deadliest earthquake this year: https://earthquake.usgs.gov/earthquakes/eventpage/us6000f65h/executive Edit: An hour later the most likely scenario is now over 100,000...

https://earthquake.usgs.gov/earthquakes/eventpage/ak0219neiszm/executive https://earthquake.usgs.gov/earthquakes/eventpage/ak0219neiszm/region-info 2021-07-29 06:15:47 (UTC) 55.325°N 157.841°W 32.2 km depth A lot of aftershocks...

M 4.9 - 4km NE of Westmorland, CA https://earthquake.usgs.gov/earthquakes/eventpage/ci39641528/executive 2020-10-01 00:31:27 (UTC) 33.056°N 115.590°W 11.5 km depth M 4.5 - 4km NE of Westmorland, CA https://earthquake.usgs.gov/earthquakes/eventpage/ci39643328/executive 2020-10-01 03:36:34...

https://www.usatoday.com/story/news/nation/2020/05/15/tonopah-nevada-earthquake-aftershocks-california/5196985002/ Woke me up at 4AM. I am 150 miles North West of the quake

I've created an excel spreadsheet with the given model in addition to calculating radius of the layer by subtracting depth from 6371. I've calculated Zf. I've also found what I think is vs by doing alpha * (radius column/6371), but that could be wrong. I know I need to find where 20/6371 =...

I was told to solve the second equation above for x to get l2 and l2, but that only gets me those in terms of other unknowns. I'm assuming I just need to solve t for my knowns, but I keep getting caught up by my unknowns. i.e., solving for x gives x = (l2*L*v2)/(l1*v1+l2*v2). Please note "l" is...

M 6.5 - 72km W of Challis, Idaho, https://earthquake.usgs.gov/earthquakes/eventpage/us70008jr5/executive 2020-03-31 23:52:31 (UTC) 44.448°N 115.136°W 10.0 km depth followed by M 4.8 - 38km SW of Challis, Idaho, https://earthquake.usgs.gov/earthquakes/eventpage/ak020485mtmv/executive...

5.7 magnitude earthquake in Utah knocks out power to thousands and diverts flights https://www.cnn.com/2020/03/18/us/utah-earthquake/index.html M 5.7 - 6km NNE of Magna, Utah, 15.8 km (9.8 mi) E of Salt Lake City https://earthquake.usgs.gov/earthquakes/eventpage/uu60363602/executive 2020-03-18...

Is a 10.0 magnitude earthquake theoretically possible? The most -powerful quake ever recorded was a 9.5, which occurred just off the coast of Chile on May 22nd, 1960.

I have a project to create a program to predict tsunami possibility by gathering data and finding pattern from previous earthquakes. It would be using neural network. But I don't really know what I should consider from the data. Is it the magnitude that cause the tsunami? Or is it the depth...

https://earthquake.usgs.gov/earthquakes/eventpage/us1000hiup/executive M 6.1 - 64km ESE of Waitara, New Zealand 2018-10-30 02:13:39 (UTC) 39.054°S 174.977°E 227.3 km depth - every deep Yesterday, a Mag 6.3 in Drake Passage, south of Patagonia...

I noticed a relatively strong earthquake in SE Europe this weekend. https://earthquake.usgs.gov/earthquakes/eventpage/us1000hi43/executive M5.5 - 16km SE of Comandau, Romania 2018-10-28 00:38:11 (UTC) 45.652°N 26.403°E 151.0 km depth - very deep Then I noticed several earthquakes in the Ionian...

M 7.8 - 101km ESE of Suva, Fiji 2018-09-06 15:49:14 UTC Location 18.494°S 179.332°E, 608.6 km depth https://earthquake.usgs.gov/earthquakes/eventpage/us2000h9e2#executive Very deep. A number of deep aftershocks have occurred. Potential for Mag 8 earthquakes in that region - along the Tonga...

USGS reports M 6.6 - 27km E of Tomakomai, Japan 2018-09-05 18:07:58 UTC 42.671°N, 141.933°E 33.4 km depth https://earthquake.usgs.gov/earthquakes/eventpage/us2000h8ty#executivePowerful M6.7 earthquake rocks Hokkaido, causing massive landslides; nine dead and 31 reported missing...

https://www.stuff.co.nz/world/asia/106031224/magnitude-7-quake-strikes-indonesias-lombok-island-indonesian-officials-say-tsunami-possible

How come I saw a video of a magnitude 6.9 earthquake on the island of Hawaii on the evening news just now, and the grocery store products were not even falling off the shelves (and no deaths or injuries), versus the same magnitude earthquake prediction here on top of the Hayward Fault (east of...