Earthquakes around the world
- Thread starter pescado
- Start date
Around 5 hours later and also in the Pacific another sixer:
6.1-magnitude earthquake hits south of the Fiji Islands
An earthquake with a magnitude of 6.1 jolted south of the Fiji Islands at 07:04:32 GMT on Friday, the U.S. Geological Survey said. The epicenter, with a depth of 463.9 km, was initially determined to be at 25.6127 degrees south latitude and...
www.sott.net
Last week I thought of finished in the post by saying stillness before the storm. And the M7.6 in Alaska did get the big blue marble rolling.
In the usual area there were 40 out of 136 earthquakes worldwide equal or greater to 4.5 and 2074 out of 2541 quakes of all sizes.
Percentage: 81.6%
5.5-magnitude quake hits 55 km NNE of Mamuju, Indonesia: USGS
October 28, 2020Moderate mag. 5.5 earthquake - 123 Km NNE of Atka, Alaska, USA
Date & time: Wednesday, 28 October 2020 04:13 UTCLocal time at epicenter: 27 Oct 4:13 pm (GMT -12)
Magnitude: 5.5
Depth: 233.2 km
Epicenter latitude / longitude: 53.2014°N / 173.4182°W
Nearest volcano: Korovin (105 km / 65 mi)
5.5-Magnitude Earthquake Strikes Chile, EMSC Reports
According to seismologists, the earthquake occurred at a depth of 62 kilometres.
sputniknews.com
5.6-magnitude quake hits 56 km WSW of Changuillo, Peru -- USGS
2020-10-28Urgent: 5.8-magnitude quake hits 65 km SSW of Sola, Vanuatu: USGS
October 28, 2020
5.8-Magnitude Earthquake Rocks Chile
According to the United States Geological Survey, the quake occurred 63 km to the north of La Serena.
sputniknews.com
Large 6.9/7.1 quake reported off the coast of Greece/Turkey (added: footage claiming to be from the recent quake of a building that has collapse, i'm guessing in Turkey):
It's not currently showing on USGS. But from CSEM:
Added: It's now up on USGS as an M7:
It's not currently showing on USGS. But from CSEM:
Added: It's now up on USGS as an M7:
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Tectonic Summary
The October 30, 2020, M 7.0 earthquake offshore Samos Island, Greece, occurred as the result of normal faulting at a shallow crustal depth within the Eurasia tectonic plate in the eastern Aegean Sea. The focal mechanism solution indicates that the earthquake occurred on a moderately dipping normal fault striking either eastward or westward. This mechanism indicates north-south oriented extension that is common in the Aegean Sea. Tectonics in the region surrounding this earthquake are relatively complex; to the south, Africa (Nubia) lithosphere subducts northward beneath the Eurasia plate at the Hellenic Trench; to the east, the Anatolian microplate (part of Eurasia) moves in a general westward direction, driving right-lateral faulting along its northern boundary, the North Anatolian Fault, and left-lateral faulting in southeast Turkey. The Aegean Sea region, western Turkey, and southern Greece where the October 30 earthquake occurred overall experiences north-south extension that is driven by southward migration of the Hellenic Trench.In western Turkey and the Aegean Sea region, historic earthquakes demonstrate a mixture of transtensional and extensional faulting focal mechanism solutions. The October 30, 2020 earthquake produced nearly pure normal faulting, and is broadly consistent with past earthquakes in the region. The location of the October 30, 2020 event is about 250 km north of the closest main plate boundary, where the Africa plate moves to the north at a rate of approximately 10 mm/yr with respect to Eurasia; this earthquake is thus considered an intraplate event.
While commonly plotted as points on maps, earthquakes of this size are more appropriately described as slip over a larger fault area. M7 normal faulting events typically have a fault area of 50 x 20 km.
The Aegean Sea frequently experiences moderate to large earthquakes, and the region within 250 km of the October 30, 2020 earthquake has hosted 29 other M 6+ events over the preceding 100 years. The largest instrumentally documented earthquake in the region was a M 7.7 earthquake in July 1956 between the islands of Naxos and Santorini (Thera), and southwest of the October 30, 2020 earthquake. The 1956 earthquake was the largest earthquake of the 20th century in Greece. As a result of this 1956 event, a M 7.2 aftershock occurred 13 minutes later with an accompanying large tsunami, 53 fatalities, 100 injuries, and extensive damage in Amorgos and nearby Santorini. More recently, on June 20 2017 a M 6.6 earthquake occurred southeast of the October 30, 2020 event near Bodrum, Turkey, and resulted in 2 fatalities and hundreds of injuries reported in Greece and Turkey.
