Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Moderate mag. 4.9 earthquake - Alaska, USA, on Tuesday, Sep 20, 2022 at 12:37 am (GMT -8) -

Moderate mag. 4.9 earthquake - Alaska, USA, on Tuesday, Sep 20, 2022 at 12:37 am (GMT -8) Moderate mag. 4.9 earthquake - Alaska, USA, on Tuesday, Sep 20, 2022 at 12:37 am (GMT -8)

Moderate magnitude 4.9 earthquake at 36 km depth

20 Sep 08:40 UTC: First to report: USGS after 3 minutes.
20 Sep 08:48: Magnitude recalculated from 4.8 to 4.9. Hypocenter depth recalculated from 46.7 to 35.7 km (from 29 to 22 mi). Epicenter location corrected by 5.1 km (3.2 mi) towards SE.
20 Sep 08:48: Magnitude recalculated from 4.9 to 4.7. Hypocenter depth recalculated from 35.7 to 33.5 km (from 22 to 21 mi). Epicenter location corrected by 10.9 km (6.8 mi) towards NW.
21 Sep 10:02: Magnitude recalculated from 4.7 to 4.9. Hypocenter depth recalculated from 33.5 to 35.7 km (from 21 to 22 mi). Epicenter location corrected by 10.9 km (6.8 mi) towards SE.

Earthquake details

Date & timeSep 20, 2022 08:37:38 UTC -
Local time at epicenterTuesday, Sep 20, 2022 at 12:37 am (GMT -8)
StatusConfirmed
Magnitude4.9
Depth35.7 km
Epicenter latitude / longitude56.141°N / 156.4328°W (Gulf of Alaska, Alaska, United States)
Antipode56.141°S / 23.567°E
Shaking intensityLight shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoYantarni (108 km / 67 mi)
Nearby towns and cities131 km (81 mi) E of Chignik Lagoon (pop: 78) | Show on map | Quakes nearby
270 km (168 mi) ENE of Sand Point (pop: 1,060) | Show on map | Quakes nearby
294 km (183 mi) SW of Kodiak Station (pop: 1,300) | Show on map | Quakes nearby
305 km (190 mi) SW of Kodiak (pop: 6,250) | Show on map | Quakes nearby
344 km (214 mi) SSE of Dillingham (pop: 2,400) | Show on map | Quakes nearby
389 km (242 mi) ENE of King Cove (pop: 1,010) | Show on map | Quakes nearby
485 km (301 mi) SW of Homer (pop: 5,520) | Show on map | Quakes nearby
502 km (312 mi) SW of Fritz Creek (pop: 1,930) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 10.4°C (51 F), humidity: 64%, wind: 6 m/s (11 kts) from NNW
Estimated seismic energy released1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) | about seismic energy
Show interactive Map
[smaller] [bigger]

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.
Mag.DepthLocationSource
4.936 kmAlaska PeninsulaUSGS
5.145 kmALASKA PENINSULAEMSC
4.936 kmAlaska PeninsulaRaspberryShake
5.536 kmAlaska PeninsulaGFZ
5.110 kmNear AnchorageRENASS
5.245 kmAlaska PeninsulaGeoAu

Seismograms

Seismic station: College Outpost, Alaska, USA (COLA/IU network) | Distance from quake: 1076 km / 669 mi | Show on map | Station Info
Seismic station College Outpost, Alaska, USA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Earlier earthquakes in the same area since 1900

Date and time GMTMag
Depth
DistanceLocationDetails
Jul 29, 2021 06:15
1 year 19 weeks ago
8.2

32 km
127km / 79mi104 mi E of Sand Point, Aleutians East, Alaska, USAMore
Nov 10, 1938 20:18
84 years ago
8.2

35 km
153km / 95mi47 mi NE of Simeonof Island, Aleutians East, Alaska, USAMore
Oct 9, 1900 12:25
122 years ago
7.9

0 km
209km / 130mi10.2 mi SW of Old Harbor, Kodiak Island Borough, Alaska, USAMore
Jul 22, 2020 06:12
2 years ago
7.8

28 km
180km / 112mi31 mi E of Simeonof Island, Aleutians East, Alaska, USAMore
Oct 19, 2020 20:54
2 years ago
7.6

35 km
264km / 164mi60 mi SE of Sand Point, Aleutians East, Alaska, USAMore
May 31, 1917 08:47
106 years ago
7.4

35 km
232km / 144miLittle Koniuji Island, 50 mi SE of Sand Point, Aleutians East, Alaska, USAMore
Nov 7, 1912 07:40
110 years ago
7.3

90 km
175km / 108mi57 mi W of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Dec 23, 1906 17:22
116 years ago
7.3

0 km
174km / 108miKodiak Island Borough Parish, 12 mi SE of Akhiok, Kodiak Island Borough, Alaska, USAMore
Sep 4, 1989 13:14
33 years ago
7.1

11 km
71km / 44miAlaska, USAMore
Dec 6, 1999 23:12
23 years ago
7.0

44 km
184km / 115miKodiak Island Borough Parish, 32 mi W of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Sep 4, 1965 14:32
57 years ago
7.0

28 km
320km / 199mi13 mi N of Spruce Island, Kodiak Island Borough, Alaska, USAMore
Apr 10, 1957 11:30
66 years ago
7.0

15 km
156km / 97mi145 mi SW of Kodiak, Alaska, USAMore
May 4, 1923 16:26
100 years ago
7.0

25 km
43km / 27miSouth Island, 147 mi E of Sand Point, Aleutians East, Alaska, USAMore
Oct 11, 2021 09:10
1 year 8 weeks ago
6.9

69 km
15km / 9miAlaska, USAMore
Aug 14, 2021 11:57
1 year 17 weeks ago
6.9

21 km
129km / 80mi111 mi E of Sand Point, Aleutians East, Alaska, USAMore
Jan 10, 2001 16:02
22 years ago
6.9

36 km
206km / 128mi44 mi S of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
May 13, 1993 11:59
30 years ago
6.9

32 km
274km / 170miPopof Island, 11 mi S of Sand Point, Aleutians East, Alaska, USAMore
Feb 6, 1964 13:07
59 years ago
6.9

20 km
61km / 38miChirikof Island, 194 mi SW of Kodiak, Alaska, USAMore
Feb 13, 1951 22:13
72 years ago
6.9

20 km
39km / 24mi22 mi SE of South Island, Kodiak Island Borough, Alaska, USAMore
Nov 17, 1938 03:54
84 years ago
6.9

35 km
120km / 75mi59 mi SW of South Island, Kodiak Island Borough, Alaska, USAMore
Dec 5, 1912 12:27
110 years ago
6.9

90 km
212km / 131miKodiak Island Borough Parish, 2.9 mi S of Larsen Bay, Kodiak Island Borough, Alaska, USAMore
Jun 19, 1986 09:09
36 years ago
6.8

17 km
219km / 136mi103 mi S of Kodiak, Alaska, USAMore
Apr 4, 1964 17:46
59 years ago
6.8

18 km
125km / 77mi14 mi SE of Tugidak Island, Kodiak Island Borough, Alaska, USAMore
Nov 29, 1952 23:46
70 years ago
6.8

20 km
148km / 92mi17 mi S of Sitkinak Island, Kodiak Island Borough, Alaska, USAMore
May 13, 1910 07:58
113 years ago
6.8

100 km
239km / 148mi117 mi N of Sand Point, Aleutians East, Alaska, USAMore
May 29, 2015 07:00
8 years ago
6.7

56 km
50km / 31mi21 mi SE of Ugaiushak Island, Lake and Peninsula, Alaska, USAMore
Feb 13, 1979 05:34
44 years ago
6.7

33 km
89km / 55mi40 mi SW of South Island, Kodiak Island Borough, Alaska, USAMore
Mar 30, 1964 02:18
59 years ago
6.7

19 km
228km / 142mi41 mi SE of Nasikan Island, Kodiak Island Borough, Alaska, USAMore
Jul 28, 1934 21:37
88 years ago
6.7

20 km
55km / 34mi22 mi S of South Island, Kodiak Island Borough, Alaska, USAMore
Oct 9, 1985 09:33
37 years ago
6.6

30 km
252km / 157mi53 mi SE of Sand Point, Aleutians East, Alaska, USAMore
Apr 12, 1978 03:42
45 years ago
6.6

14 km
233km / 145mi93 mi S of Kodiak Station, Kodiak Island Borough, Alaska, USAMore
Mar 28, 1964 12:20
59 years ago
6.6

25 km
147km / 91mi14 mi S of Sitkinak Island, Kodiak Island Borough, Alaska, USAMore
Nov 11, 1938 00:57
84 years ago
6.6

35 km
189km / 117mi24 mi E of Simeonof Island, Aleutians East, Alaska, USAMore
Oct 16, 1932 12:08
90 years ago
6.6

25 km
245km / 152mi49 mi SE of Sand Point, Aleutians East, Alaska, USAMore
Jul 11, 2000 01:32
22 years ago
6.5

43 km
192km / 119miKodiak Island Borough Parish, 27 mi W of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Sep 12, 1986 23:57
36 years ago
6.5

31 km
188km / 117mi116 mi S of Kodiak, Alaska, USAMore
Feb 14, 1983 03:20
40 years ago
6.5

47 km
220km / 136miSimeonof Island, 59 mi SE of Sand Point, Aleutians East, Alaska, USAMore
Dec 7, 1999 00:19
23 years ago
6.4

44 km
178km / 110miKodiak Island Borough Parish, 32 mi SW of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
May 20, 1979 08:14
44 years ago
6.4

71 km
59km / 37miUgaiushak Island, 180 mi SW of Kodiak, Alaska, USAMore
Mar 24, 1972 03:38
51 years ago
6.4

68 km
51km / 32mi22 mi NW of South Island, Kodiak Island Borough, Alaska, USAMore
Apr 2, 2016 05:50
7 years ago
6.2

10 km
151km / 94mi29 mi NE of Port Heiden, Lake and Peninsula, Alaska, USAMore
Jul 29, 2021 06:19
1 year 19 weeks ago
6.1

27 km
161km / 100mi95 mi E of Sand Point, Aleutians East, Alaska, USAMore
Jul 22, 2020 06:16
2 years ago
6.1

18 km
212km / 132miSimeonof Island, 64 mi SE of Sand Point, Aleutians East, Alaska, USAMore
May 29, 1990 18:31
33 years ago
6.1

25 km
198km / 123miNasikan Island, 72 mi SW of Kodiak, Alaska, USAMore
Nov 14, 1985 22:17
37 years ago
6.1

33 km
262km / 163mi49 mi SE of Sand Point, Aleutians East, Alaska, USAMore
May 25, 2008 19:18
15 years ago
6.0

20 km
184km / 114mi60 mi SE of Tugidak Island, Kodiak Island Borough, Alaska, USAMore
Feb 22, 1989 10:25
34 years ago
6.0

33 km
173km / 107mi122 mi S of Kodiak, Alaska, USAMore
Jan 2, 1985 05:32
38 years ago
6.0

33 km
118km / 73mi57 mi SW of South Island, Kodiak Island Borough, Alaska, USAMore
Apr 6, 1974 03:56
49 years ago
6.0

40 km
276km / 172miShumagin Islands, 15 mi S of Sand Point, Aleutians East, Alaska, USAMore
Mar 11, 1970 22:38
53 years ago
6.0

39 km
201km / 125miKodiak Island Borough Parish, 21 mi W of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Jul 29, 2021 06:23
1 year 19 weeks ago
5.9

5.3 km
99km / 62mi124 mi E of Sand Point, Aleutians East, Alaska, USAMore
Aug 22, 1973 18:14
49 years ago
5.9

38 km
176km / 109mi32 mi SW of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
May 29, 1955 13:31
68 years ago
5.9

15 km
139km / 86mi162 mi SW of Kodiak, Alaska, USAMore
Dec 12, 1952 00:47
70 years ago
5.9

25 km
152km / 94miSitkinak Island, 32 mi S of Akhiok, Kodiak Island Borough, Alaska, USAMore
Jan 5, 2007 16:52
16 years ago
5.8

4.9 km
84km / 52miAlaska, USAMore
Apr 9, 2005 15:16
18 years ago
5.8

10 km
136km / 84mi143 mi SW of Kodiak, Alaska, USAMore
Jan 14, 1983 18:20
40 years ago
5.8

33 km
144km / 89mi146 mi SW of Kodiak, Alaska, USAMore
Feb 21, 1972 19:34
51 years ago
5.8

54 km
122km / 76mi37 mi SW of Nakchamik Island, Lake and Peninsula, Alaska, USAMore
May 8, 1964 16:21
59 years ago
5.8

24 km
147km / 91miSitkinak Island, 29 mi S of Akhiok, Kodiak Island Borough, Alaska, USAMore
May 31, 2016 20:51
7 years ago
5.7

39 km
152km / 95mi40 mi SE of Perryville, Lake and Peninsula, Alaska, USAMore
Feb 7, 1967 14:53
56 years ago
5.7

62 km
69km / 43miSutwik Island, 204 mi SW of Kodiak, Alaska, USAMore
May 29, 1955 21:03
68 years ago
5.7

15 km
140km / 87mi175 mi SW of Kodiak, Alaska, USAMore
Oct 31, 2021 16:37
1 year 5 weeks ago
5.6

25 km
198km / 123mi75 mi E of Sand Point, Aleutians East, Alaska, USAMore
Sep 16, 2021 17:51
1 year 12 weeks ago
5.6

37 km
124km / 77mi160 mi E of Sand Point, Aleutians East, Alaska, USAMore
Feb 7, 1996 21:19
27 years ago
5.6

20 km
97km / 61miAlaska, USAMore
Jun 22, 1970 14:39
52 years ago
5.6

25 km
124km / 77mi154 mi E of Sand Point, Aleutians East, Alaska, USAMore
Apr 6, 1966 22:28
57 years ago
5.6

26 km
116km / 72miTugidak Island, 42 mi SW of Akhiok, Kodiak Island Borough, Alaska, USAMore
Jul 30, 2021 03:52
1 year 19 weeks ago
5.5

33 km
94km / 59mi138 mi E of Sand Point, Aleutians East, Alaska, USAMore
Jul 29, 2021 06:32
1 year 19 weeks ago
5.5

10 km
136km / 84mi164 mi E of Sand Point, Aleutians East, Alaska, USAMore
Dec 7, 2013 16:44
9 years ago
5.5

13 km
138km / 86mi105 mi E of Sand Point, Aleutians East, Alaska, USAMore
Sep 18, 2012 01:44
10 years ago
5.5

48 km
166km / 103mi5.5 mi SE of Akhiok, Kodiak Island Borough, Alaska, USAMore
Mar 10, 2012 14:10
11 years ago
5.5

44 km
148km / 92mi129 mi E of Sand Point, Aleutians East, Alaska, USAMore
Dec 22, 2000 00:40
22 years ago
5.5

92 km
112km / 69mi17 mi NW of Nakchamik Island, Lake and Peninsula, Alaska, USAMore
Jul 11, 2000 01:38
22 years ago
5.5

38 km
191km / 118miKodiak Island Borough Parish, 29 mi W of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
May 28, 1993 15:55
30 years ago
5.5

33 km
84km / 52mi18 mi E of Chirikof Island, Kodiak Island Borough, Alaska, USAMore
Apr 16, 1993 04:09
30 years ago
5.5

25 km
84km / 52mi27 mi SW of Tugidak Island, Kodiak Island Borough, Alaska, USAMore
Feb 24, 1972 01:43
51 years ago
5.5

59 km
116km / 72mi37 mi S of Nakchamik Island, Lake and Peninsula, Alaska, USAMore
Sep 8, 1965 11:16
57 years ago
5.5

24 km
85km / 53mi15 mi SE of Chirikof Island, Kodiak Island Borough, Alaska, USAMore
Dec 7, 2013 07:36
9 years ago
5.4

52 km
108km / 67mi24 mi NW of Tugidak Island, Kodiak Island Borough, Alaska, USAMore
Jan 27, 2004 09:50
19 years ago
5.4

44 km
53km / 33mi19 mi SE of Ugaiushak Island, Lake and Peninsula, Alaska, USAMore
Mar 8, 2000 14:20
23 years ago
5.4

40 km
188km / 117miKodiak Island Borough Parish, 29 mi W of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Sep 12, 1992 14:59
30 years ago
5.4

55 km
145km / 90miAlaska, USAMore
Jan 1, 1991 15:50
32 years ago
5.4

33 km
164km / 102mi39 mi NE of Simeonof Island, Aleutians East, Alaska, USAMore
Sep 26, 1983 23:52
39 years ago
5.4

85 km
145km / 90miKodiak Island Borough Parish, Alaska, USAMore
Feb 20, 2022 11:47
42 weeks ago
5.3

26 km
129km / 80mi106 mi E of Sand Point, Aleutians East, Alaska, USAMore
Jul 29, 2021 20:32
1 year 19 weeks ago
5.3

10.1 km
107km / 66mi148 mi E of Sand Point, Aleutians East, Alaska, USAMore
Feb 13, 2021 13:08
1 year 43 weeks ago
5.3

39 km
138km / 86mi62 mi W of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Aug 18, 2020 18:28
2 years ago
5.3

5 km
145km / 90mi96 mi E of Sand Point, Aleutians East, Alaska, USAMore
Aug 8, 2020 12:52
2 years ago
5.3

25 km
188km / 117mi96 mi E of Sand Point, Aleutians East, Alaska, USAMore
Dec 6, 1999 23:22
23 years ago
5.3

42 km
186km / 115miKodiak Island Borough Parish, 27 mi SW of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Dec 28, 1985 07:44
37 years ago
5.3

59 km
49km / 30mi20 mi SE of Ugaiushak Island, Lake and Peninsula, Alaska, USAMore
Nov 26, 1983 15:51
39 years ago
5.3

33 km
97km / 60mi82 mi SW of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Apr 28, 2022 03:33
32 weeks ago
5.2

83 km
25km / 15mi183 mi SW of Kodiak, Alaska, USAMore
Aug 9, 2020 14:57
2 years ago
5.2

33 km
154km / 95mi102 mi E of Sand Point, Aleutians East, Alaska, USAMore
Nov 12, 2016 21:52
6 years ago
5.2

11 km
130km / 81mi36 mi E of Port Heiden, Lake and Peninsula, Alaska, USAMore
Feb 14, 2016 07:33
7 years ago
5.2

63 km
69km / 43miUgaiushak Island, 173 mi SW of Kodiak, Alaska, USAMore
Jun 13, 2015 01:14
7 years ago
5.2

46 km
63km / 39miUgaiushak Island, 183 mi SW of Kodiak, Alaska, USAMore
Sep 18, 2012 01:44
10 years ago
5.2

39 km
166km / 103mi1.2 mi SE of Akhiok, Kodiak Island Borough, Alaska, USAMore
Jul 4, 2011 21:01
11 years ago
5.2

12 km
141km / 88mi107 mi E of Sand Point, Aleutians East, Alaska, USAMore
Jul 19, 2006 11:44
16 years ago
5.2

39 km
143km / 89mi58 mi W of Florida Blanca Island, Kodiak Island Borough, Alaska, USAMore
Show all

Map of earlier quakes

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Design upgrade
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
IAVCEI
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings