Major mag. 7.8 earthquake - 105 km SSE of Perryville, Alaska (USA) on Wednesday, 22 July 2020 - information

Update Wed 22 Jul 2020 06:35
Tsunami warning:
National Tsunami Warning Center issued a tsunami alert.
Tsunami Warning in Effect for: * SOUTH ALASKA AND THE ALASKA PENINSULA, Pacific coasts from

Kennedy Entrance, Alaska (40 miles SW of Homer) to Unimak
Pass, Alaska (80 miles NE of Unalaska)

For current updates, check www.tsunami.gov

Molto forte terremoto magnitudine 7.8 - 105 Km SSE of Perryville, Alaska (USA), mercoledì, 22 luglio 2020

- Molto forte terremoto magnitudine 7.8 - 105 Km SSE of Perryville, Alaska (USA), mercoledì, 22 luglio 2020

Major magnitude 7.8 earthquake at 28 km depth

22 Jul 06:21 UTC: Primo a segnalare: USGS dopo 8 minuti.
Jul 22 06:30: Magnitudine ricalcolata da 7.4 a 7.8.
Profondità ricalcolata da 13.0 a 10.0 km.
Profondità ricalcolata da 10.0 a 28.0 km.
Data & ora: 22 Jul 2020 06:12:44 UTC -
Magnitudine: 7.8
Profondità: 28.0 km
Epicentro latitudine / longitudine: 55,0298°N / 158,5217°W (Alaska, Stati Uniti)
Vulcano più vicino: Kupreanof (116 km / 72 mi)
Nearby towns and cities:
106 km SSE da Perryville (Lake and Peninsula County) (pop: 113)
130 km ESE da Sand Point (Aleutians East County) (pop: 1,060)
137 km S da Chignik Lake (Lake and Peninsula County) (pop: 73)
141 km S da Chignik (Lake and Peninsula County) (pop: 87)
242 km E da King Cove (Aleutians East County) (pop: 1,010)
485 km SW da Kodiak (pop: 6,250)
736 km SW da Kalifornsky (Kenai Peninsula County) (pop: 7,850)
1509 km W da Juneau (pop: 32,800)
Fonte dati primaria: USGS
Stima dell'energia sismica liberata: 3,2 x 1016 joules (8784 gigawatt hours, equivalent to 7,6 x 106 tons of TNT or 472,4 atomic bombs!) [saperne di più]
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
MagnitudineProfonditàUbicazioneFonte
M 7.828 km105 km SSE of Perryville, Alaska (USA)USGS
M 7.830 kmAlaska Peninsula (USA)GFZ
M 7.830 kmAlaska Peninsula (USA)EMSC
M 7.822 kmAlaska Peninsula (USA)GeoAu
M 7.720 kmAlaska Peninsula, United States [Sea: United States] (USA)INGV
M 7.626 kmAlaska Peninsula (USA)BMKG

User reports for this quake (56)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Alaska (48.4 km WSW of epicenter) [Map] / Severe shaking (MMI VIII) : I thought the world was going under At first it started to shake a little bit which made us stronger, we ran out and the electricity went out and some old houses fell a few minutes later the electricity went on again and I got a tsunami warning right away. If a tsunami had occurred we would have died because we got the message too late I'm glad to have survived!
Chignik Bay (141 km N of epicenter) [Map] / Very strong shaking (MMI VII) : A lot of items fell off the shelves. No damage to buildings. Slight tidal rise and fall. Still feeling aftershocks the second day.
Naknek, AK (422.9 km NNE of epicenter) [Map] / Weak shaking (MMI III) : Working down at the dock and felt the conveyor belt tables shake, we looked above and the light fixtures and hanging outlets were swinging. Out supervisors evacuated us all until it was safe to return
Southwest Anchorage, AK (846 km NNE of epicenter) [Map] / not felt : I was watching the local news when I would have felt shaking from this earthquake. My mom rushed to my room to as if I saw a tsunami warning WEA (Wireless Emergency Alert) coming through on my iPhone. I got mine 15 minutes after she did. I know that many other people in the Anchorage area felt it & I feel lucky to be one of the individuals to not feel this tremor.
Alaska (94 km SE of epicenter) [Map] / Severe shaking (MMI VIII) : I thought the world was going to end
3340.1 km ESE of epicenter [Map] / Very weak shaking (MMI II) (reported through our app)
5084.3 km ENE of epicenter [Map] / Violent shaking (MMI IX) (reported through our app)
2728.1 km E of epicenter [Map] / Very weak shaking (MMI II) : My dogs woke me up....I don't know if it was the quake but it was the same time (reported through our app)
St. Lawrence island (1221 km NNW of epicenter) [Map] / not felt (reported through our app)
Buellton CA (3707.4 km ESE of epicenter) [Map] / Weak shaking (MMI III) : Swaying feeling (reported through our app)
Point hope (1540 km NNW of epicenter) [Map] / Weak shaking (MMI III) : Very light shake.. (reported through our app)
3765.3 km ESE of epicenter [Map] / Weak shaking (MMI III) (reported through our app)
King Salmon, Alaska (404.2 km N of epicenter) [Map] / Weak shaking (MMI III)
426.5 km NNE of epicenter [Map] / Moderate shaking (MMI V)
Phelan (3881.8 km ESE of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
874.4 km NNE of epicenter [Map] / not felt (reported through our app)
Homer (662.4 km NE of epicenter) [Map] / Light shaking (MMI IV) : Light shaker long time (reported through our app)
748.9 km NNE of epicenter [Map] / Very weak shaking (MMI II) : Grandfather clock started rattling. (reported through our app)
3836.6 km ESE of epicenter [Map] / Strong shaking (MMI VI) (reported through our app)
North Vancouver, BC., Canada / Weak shaking (MMI III) : Brief sensation of tingling in feet and lower legs, lasted about 1 minute. Reminiscent of a very large truck parking too close to building effecting the room I was in. Vibration moved east to west through livingroom. Strong enough and long enough for me to ask if it was felt by a friend.
South Pasadena Ca / not felt : I live in an A frame wood house - hard to describe but the house made this crackling noise that seemed to roll through the entire house. Now I'm wondering if that's why my dog was panting in the dark.
South Pasadena Ca / not felt : I live in an A frame wood house - hard to describe but the house made this crackling noise that seemed to roll through the entire house. Now I'm wondering if that's why my dog was panting in the dark.
Oscarville , about 5 miles from Bethel / Weak shaking (MMI III) : The house shook for a good minute. The hanging decorations swayed. The water in the pitcher sloshed around.
Chignik Lagoon / Very strong shaking (MMI VII) : Lasted a long time. Probably over one minute. Lots of items fell to the floor. Three small aftershocks with in 15 minutes.
South Amchorage / Weak shaking (MMI III) : Got the emergency tsunami alert and was startled cause I hadn't felt anything. When I looked up, my chandelier was swinging a very wide swing and didnt stop swimimg for 19 minutes.
King Salmon, AK / Weak shaking (MMI III) : My wife felt it. The open door moved back and forth maybe 1 inch. The towels swayed a little-less than 1 inch.
Sandy, People's Republic of Utah / not felt : Not my fault.
placerville CA / Very weak shaking (MMI II)
Togiak, AK / Very weak shaking (MMI II) : Felt light shaking.
placerville CA / Very weak shaking (MMI II)
Akutan, Ak / Moderate shaking (MMI V) : Long for a minute approximately, started slow progressively getting more aggressive.
Los Ángeles / Weak shaking (MMI III) : It was in the middle of the night and I felt of shaking
Los Ángeles / Weak shaking (MMI III) : It was in the middle of the night and I felt of shaking
Los Ángeles / Weak shaking (MMI III) : It was in the middle of the night and I felt of shaking
Chignik Lake / Strong shaking (MMI VI)
Perryville / Very strong shaking (MMI VII) : very strong shaking pictures knocked off walls standing glasses tipped over
Tuolumne California / Light shaking (MMI IV) : Lots of light shaking last few here
Naknek / Light shaking (MMI IV)
Naknek AK / Very weak shaking (MMI II) : On bottom floor in Naknek felt the bed shake, curtains and wall hanging a were shaking.
homer, alaska / Light shaking (MMI IV)
Anchorage / not felt
Port Moller ak / Very strong shaking (MMI VII) : Definitely felt this one
Bethel, AK / not felt : Didn’t feel it but hanging light swayed for about 2-5 mins.
Bellevu, WA / not felt : Bowl in cabinet shifted
Igiugig / Moderate shaking (MMI V)
Anchor point, AK / not felt : Received a tsunami warning alert
King Salmon / Light shaking (MMI IV) : Everything in my house was shaking
King Salmon, Ak / Moderate shaking (MMI V) : Lasted a long time...over 1 minute. Strong shaking and swaying
Anchorage (United States, 846 km NE of epicenter) : Didn’t feel a thing. We were awake and chilling. There was no observable movement. (reported through EMSC)
Town and Country (United States, 2930 km E of epicenter) : Bed shuttered (reported through EMSC)
Knik-Fairview (United States of America, 881 km NE of epicenter) : Felt nothing in Wasilla. Hope everyone is ok further south. (reported through EMSC)
Anchorage (United States, 846 km NE of epicenter) : Felt nothing.... was on the couch... (reported through EMSC)
Vancouver (Canada, 2481 km E of epicenter) : Felt very dizzy (reported through EMSC)
Anchorage (United States, 848 km NE of epicenter) : The chandelier was swinging 6in both ways and swung for 19 minutes. Feels very dizzy. Shocking (reported through EMSC)
Homer (United States, 656 km NE of epicenter) : Bed and curtains were going. Felt like a very long quake! Felt at Homer, Ak at the end of the Spit @ Lands End. (reported through EMSC)
Naknek (United States of America, 413 km N of epicenter) : We felt it! (reported through EMSC)
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Aftershocks of the 7.8 quake 105 Km SSE of Perryville, Alaska (USA), 22 July 06:12 UTC

More info
Recorded aftershocks, latest first (568 quakes):
  • 23 Nov 2020 22:53 UTC
    | M 3.6 |
    36.1 km (22.4 mi) depth
    |
    18 km (11 mi) distance
    | USGS | Details
  • 23 Nov 2020 00:31 UTC
    | M 2.5 |
    0 km (0 mi) depth
    |
    437 km (272 mi) distance
    | USGS | Details
  • 23 Nov 2020 00:31 UTC
    | M 2.7 |
    35 km (21.7 mi) depth
    |
    415 km (258 mi) distance
    | EMSC | Details
  • 22 Nov 2020 15:40 UTC
    | M 2.4 |
    23.3 km (14.5 mi) depth
    |
    105 km (65 mi) distance
    | USGS | Details
  • 22 Nov 2020 15:40 UTC
    | M 2.9 |
    23 km (14.3 mi) depth
    |
    106 km (66 mi) distance
    | USGS | Details
  • 22 Nov 2020 14:09 UTC
    | M 3.9 |
    35 km (21.7 mi) depth
    |
    37 km (23 mi) distance
    | USGS | Details
  • 22 Nov 2020 11:09 UTC
    | M 4.5 |
    2.8 km (1.7 mi) depth
    |
    163 km (101 mi) distance
    | USGS | Details
  • 22 Nov 2020 09:35 UTC
    | M 3.5 |
    15 km (9.3 mi) depth
    |
    95 km (59 mi) distance
    | USGS | Details
  • 21 Nov 2020 17:44 UTC
    | M 2.2 |
    44.8 km (27.8 mi) depth
    |
    443 km (275 mi) distance
    | USGS | Details
  • 21 Nov 2020 17:44 UTC
    | M 2.6 |
    30.9 km (19.2 mi) depth
    |
    448 km (279 mi) distance
    | USGS | Details
  • 20 Nov 2020 09:37 UTC
    | M 2.8 |
    150.3 km (93.4 mi) depth
    |
    174 km (108 mi) distance
    | USGS | Details
  • 20 Nov 2020 08:08 UTC
    | M 2.5 |
    4.4 km (2.7 mi) depth
    |
    182 km (113 mi) distance
    | USGS | Details
  • 20 Nov 2020 08:08 UTC
    | M 2.4 |
    19.8 km (12.3 mi) depth
    |
    173 km (108 mi) distance
    | USGS | Details
  • 19 Nov 2020 15:45 UTC
    | M 3.1 |
    37.6 km (23.4 mi) depth
    |
    468 km (291 mi) distance
    | USGS | Details
  • 19 Nov 2020 12:45 UTC
    | M 3.9 |
    20.5 km (12.7 mi) depth
    |
    95 km (59 mi) distance
    | USGS | Details
  • 18 Nov 2020 12:25 UTC
    | M 2.0 |
    20.1 km (12.5 mi) depth
    |
    101 km (63 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area since 1900

Major magnitude. 7.8 earthquake - 105 Km SSE of Perryville, Alaska (USA), on Wednesday, 22 July 2020 at 06:12 (GMT)

Map of earlier quakes

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