Question - When was last earthquake in Anchorage?

Answered by: Kimberly Coleman  |  Category: General  |  Last Updated: 20-06-2022  |  Views: 1019  |  Total Questions: 14

Magnitude: 7. The 1964 Alaskan earthquake, also known as the Great Alaskan earthquake and Good Friday earthquake, occurred at 5:36 PM AKST on Good Friday, March 27. Across south-central Alaska, ground fissures, collapsing structures, and tsunamis resulting from the earthquake caused about 131 deaths. Alaska has 11% of the world's earthquakes, and 3 of the six largest in recorded history were located there. Since 1900, Alaska has had one magnitude 7 or 8 earthquakes per year, 45 earthquakes of magnitude 6 or 7, and 10, 000 quakes overall annually. That quake, which lasted for about 4½ minutes, was the most powerful earthquake recorded in U. S. history. It destroyed a major part of downtown Anchorage and caused a tsunami that ravaged towns on the Gulf of Alaska and beyond. The largest earthquake in Anchorage: today: 2. 9 in Anchorage, Alaska, United States. this week: 3. 9 in Sterling, Alaska, United States. this month: 4. 2 in Nikiski, Alaska, United States. this year: 5. 8 in Homer, Alaska, United States.

https://www.usgs.gov/faqs/what-does-earthquake-feel

A large earthquake far away will feel like a gentle bump followed several seconds later by stronger rolling shaking that may feel like sharp shaking for a little while. A small earthquake nearby will feel like a small sharp jolt followed by a few stronger sharp shakes that pass quickly.

https://www.ktuu.com/content/news/Magnitude-50-earthquake-hits-Alaska-felt-in-capital-city-559062861

JUNEAU, Alaska (AP) — The Alaska Earthquake Center reports that a magnitude 5. 0 earthquake hit southern Alaska. It was felt as far south as Juneau. The center says the earthquake hit at 8:32 p. m. Saturday and had an epicenter 43 miles west of Klukwan, a village of about 95 people.

https://www.alaskapublic.org/2020/01/23/6-2-magnitude-earthquake-felt-in-adak/

A strong earthquake struck about 50 miles from Adak around 9 p. m. last night, registering a magnitude of 6. 2. Ken MacPherson, a seismologist for the Alaska Earthquake Center, said this was a “crustal earthquake, ” meaning it was relatively shallow, at a depth of about 10 km.

https://www.usgs.gov/news/2018-anchorage-earthquake

This earthquake occurred in the Alaska-Aleutian subduction zone, on a fault within the subducting Pacific slab rather than on the shallower boundary between the Pacific and North American plates. The earthquake was not related to movement of a fault near the Earth's surface.

https://geology.com/records/biggest-tsunami.shtml

A tsunami with a record run-up height of 1720 feet occurred in Lituya Bay, Alaska. On the night of July 9, 1958, an earthquake along the Fairweather Fault in the Alaska Panhandle loosened about 40 million cubic yards (30. 6 million cubic meters) of rock high above the northeastern shore of Lituya Bay.

https://www.livescience.com/33556-earthquake-safety-tips.html

From this came the belief that a doorway is the safest place to be during an earthquake. In modern houses and buildings, doorways are no safer, and they do not protect you from flying or falling objects. Get under a table instead. Don't run outside.

https://earthquake.alaska.edu/

Seismicity in Alaska had another stand-out year in 2019. With a total of 50, 289 reported earthquakes, 2019 finished as a runner up to the record-breaking 2018 (figure 1). The earthquake depths ranged between 0 and 165 miles (265 km).

https://earthquake.alaska.edu/earthquakes/reports/monthly-report

During the month of December 2019, the Alaska Earthquake Center reported 3, 265 earthquakes within the state.

http://www.geo.mtu.edu/UPSeis/magnitude.html

May cause a lot of damage in very populated areas. Major earthquake. Serious damage. Great earthquake. Class Magnitude Great 8 or more Major 7 - 7. 9 Strong 6 - 6. 9 Moderate 5 - 5. 9

https://en.wikipedia.org/wiki/2018_Anchorage_earthquake

2018 Anchorage earthquake USGS-ANSS ComCat Local date November 30, 2018 Local time 08:29:28 AKST Magnitude 7. 1 Mww Depth 46. 7 km (29. 0 mi)

https://www.usgs.gov/faqs/can-megaquakes-really-happen-a-magnitude-10-or-larger

No, earthquakes of magnitude 10 or larger cannot happen. The magnitude of an earthquake is related to the length of the fault on which it occurs. No fault long enough to generate a magnitude 10 earthquake is known to exist, and if it did, it would extend around most of the planet.

https://www.cnn.com/2018/12/01/us/alaska-why-so-many-earthquakes/index.html

"Anchorage has a population of around 300, 000, while there are numerous large population centers in California. " But, Baldwin said, while the whole of the contiguous US saw about 70 earthquakes with a magnitude of 4 or above in 2017, the eastern half of the Aleutian Arc and Alaska saw 192 of the same size.

https://www.gns.cri.nz/Home/Learning/Science-Topics/Earthquakes/Monitoring-Earthquakes/Other-earthqu

During the very largest earthquakes, fault rupture can continue for up to 5 minutes as the rupture spreads over a length of say 1000km. For these earthquakes very high levels of aftershocks mean that continuous ground shaking can be felt for some hours.