5.9 3 km S of Iquique, Chile. We will keep a close eye on this hot spot as long as the activity remains high (figure 7). Most-Read. The magnitudes and rates are highly variable with time.Figure 7. We recorded a total of 6,676 earthquakes in this swarm with magnitudes ranging between 0.4 and 5.5. The largest earthquakes were two magnitude 6.4 events: one on April 2 in the Rat Islands and one on November 24 in the …
There is ongoing earthquake activity with varying event rates and magnitudes in a particular area, but without one large earthquake that triggers the activity. Other major contributors to the high total were the eastern Brooks Range swarm and a new swarm in the Purcell Mountains in the central Brooks Range region (figure 3). (Map via the Alaska Earthquake Center) © 2020 Anchorage Daily News. The activity subsided during winter and spring, but picked up again in late summer and early fall of 2019. It caused the strongest ground shaking in the area since the 1964 Mw 9.2 Great Alaska earthquake. ... 7.8 Alaska Peninsula. (Top) The number of earthquakes per month varied throughout the year. These plots show the cumulative count of earthquakes in the Eastern Brooks Range swarm with time (left) and their magnitudes with time (right).
The earthquake's epicenter was near Point Mackenzie, about 10 miles (16 km) north of Anchorage, and occurred at a depth of 29 miles (47 km).It was followed six minutes later by a magnitude 5.7 aftershock centered 2.5 miles (4.0 km) north-northwest of the municipality. While the activity level was not as high as in 2018, it still remained above the background level as of the end of 2019. 2020-07-17 05:40:36 UTC 72.1 km. With a total of 50,289 reported earthquakes, 2019 finished as a runner up to the record-breaking 2018 (figure 1). The President has declared that a major disaster occurred in the State of Alaska. An appeal for more kindness, after a late-night encounter with noisy campers. We continue to monitor this swarm closely (figure 6).This swarm began rather suddenly in early February. We continued to record aftershocks of the January 23, 2018 Mw 7.9 Offshore Kodiak earthquake, but the total number of those for the year was just slightly more than 500 (figure 3). If the application does not load, try our legacy Latest Earthquakes application. 2. Tracking COVID-19 in Alaska: 1 new death, 101 new cases reported Thursday The person who died was a male Anchorage resident in his 70s, state officials say. AK-2019-01, February 5, 2019. We recorded a total of 1,686 earthquakes within this swarm in 2019, with magnitudes ranging between 0.6 and 3.5. Southern Alaska has had: (M1.5 or greater) 12 earthquakes in the past 24 hours 76 earthquakes in the past 7 days; 305 earthquakes in the past 30 days Areas with notable activity are highlighted.Figure 4. The dense network coverage of mainland Alaska has allowed us to detect earthquakes in previously unmonitored regions, as well as much smaller earthquakes, so we can build a more complete picture of the full sequence of aftershocks and swarm activity.Last fall we reported on the status of these sequences (“On August 12, 2018 a magnitude 6.4 earthquake occurred about On November 30, 2018 a magnitude 7.1 earthquake occurred about 10 miles north of downtown Anchorage and ruptured a fault between about 20 and 35 miles deep. Seismicity in Alaska had another stand-out year in 2019. This is a list of earthquakes in 2019.Only earthquakes of magnitude 6 or above are included, unless they result in damage and/or casualties, or are notable for other reasons.
Anchorage Daily News The largest earthquakes were two magnitude 6.4 events: one on April 2 in the Rat Islands and one on November 24 in the Andreanof Islands regions of the western Aleutians. The pattern of earthquakes shows a gradual decrease in rate and magnitude and is consistent with a typical mainshock aftershock sequence.Figure 6. The peaks in March and October are related to increased activity in the Purcell Mountain swarm. The lack of a larger mainshock and distinct pattern seen in figures 4 and 5 is one thing that denotes this as a swarm. A powerful earthquake off Alaska’s southern coast has jolted coastal communities and forced residents to briefly scramble for higher ground over fears of a tsunami. These plots show the cumulative count of aftershocks from the August 12, 2018 M6.4 Kaktovik earthquake with time (left) and their magnitudes with time (right). While the November 30 earthquake did not cause casualties or serious injuries, its economical and psychological impacts on the local population were profound. It caused widespread power outages, structural and non-structural damage to public and private buildings, damage to roadways and railways, and resulted in closures of several schools and multiple businesses. All dates are listed according to UTC time.
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