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Moderate mag. 4.6 earthquake - Alaska, USA, on Friday, Mar 17, 2023 at 7:04 am (GMT -8) -

Moderate magnitude 4.6 earthquake at 14 km depth

17 Mar 15:07 UTC: First to report: USGS after 3 minutes.
17 Mar 15:17: Magnitude recalculated from 4.7 to 4.6. Hypocenter depth recalculated from 22.7 to 14.3 km (from 14.1 to 8.9 mi). Epicenter location corrected by 2.2 km (1.4 mi) towards ESE.

Earthquake details

Date & time	Mar 17, 2023 15:04:25 UTC -
Local time at epicenter	Friday, Mar 17, 2023 at 7:04 am (GMT -8)
Status	Confirmed
Magnitude	4.6
Depth	14.3 km
Epicenter latitude / longitude	59.2624°N / 144.9381°W (Gulf of Alaska, Alaska, United States)
Antipode	59.262°S / 35.062°E
Shaking intensity	Light shaking near epicenter
Felt	0 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	###NEARESTVOLCANO2###
Nearby towns and cities	150 km (93 mi) SSE of Cordova (pop: 2,200) \| Show on map \| Quakes nearby 222 km (138 mi) SSE of Valdez (pop: 3,870) \| Show on map \| Quakes nearby 270 km (168 mi) ESE of Seward (pop: 2,790) \| Show on map \| Quakes nearby 343 km (213 mi) SE of Eagle River (pop: 24,800) \| Show on map \| Quakes nearby 343 km (213 mi) SE of Eagle River (Anchorage) (pop: 24,800) \| Show on map \| Quakes nearby 350 km (217 mi) SE of Alaska City (pop: 298,700) \| Show on map \| Quakes nearby 357 km (222 mi) SE of Wasilla (pop: 9,280) \| Show on map \| Quakes nearby 358 km (222 mi) SE of Knik-Fairview (pop: 14,900) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Light Rain 5°C (41 F), humidity: 94%, wind: 18 m/s (36 kts) from SE
Estimated seismic energy released	5 x 10¹¹ joules (139 megawatt hours, equivalent to 120 tons of TNT) \| about seismic energy

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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.

Mag.	Depth	Location	Source
4.6	14 km	149 Km SSE of Cordova, Alaska	USGS
4.6	14 km	Gulf of Alaska	RaspberryShake
4.9	2 km	GULF OF ALASKA	EMSC
4.7	10 km	Gulf of Alaska	GFZ
4.9	10 km	Gulf Of Alaska	IRIS

Most recent quakes Top 20 past 24 hrs Quakes in the US Alaska

Seismograms

Seismic station: Middleton Island, AK, USA (Q23K/AK network) | Distance from quake: 82 km / 51 mi | Show on map | Station Info

Seismic station Middleton Island, AK, 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. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Middleton Island, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Middleton Island, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Khitrov Hills, AK, USA (KHIT/AK network) | Distance from quake: 162 km / 100 mi | Show on map | Station Info

Seismic station Khitrov Hills, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Khitrov Hills, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Khitrov Hills, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Logan Glacier, AK, USA (LOGN/AK network) | Distance from quake: 279 km / 173 mi | Show on map | Station Info

Seismic station Logan Glacier, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Logan Glacier, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Logan Glacier, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Pelican, AK, USA (S31K/AK network) | Distance from quake: 524 km / 326 mi | Show on map | Station Info

Seismic station Pelican, AK, 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. Bandpass filter applied: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station Pelican, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Pelican, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Pavlof South 1A, Pavlof Volcano, Alaska (PS1A/AV network) | Distance from quake: 1091 km / 678 mi | Show on map | Station Info

Seismic station Pavlof South 1A, Pavlof Volcano, Alaska: 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. Bandpass filter applied: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station Pavlof South 1A, Pavlof Volcano, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Pavlof South 1A, Pavlof Volcano, Alaska: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

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 GMT	Mag Depth	Distance	Location	Details
Mar 28, 1964 03:36 59 years ago	9.2 25 km	226km / 141mi	Valdez-Cordova Parish, 37 mi SW of Valdez, Alaska, USA	More
Nov 30, 1987 19:23 35 years ago	7.9 10 km	139km / 87mi	Alaska, USA	More
Feb 28, 1979 21:27 44 years ago	7.1 15 km	241km / 150mi	Valdez-Cordova Parish, Alaska, USA	More
Jan 31, 1912 20:11 111 years ago	7.0 80 km	240km / 149mi	Valdez-Cordova Parish, 51 mi NE of Split Island, Chugach, Alaska, USA	More
May 15, 1908 08:31 115 years ago	7.0 0 km	227km / 141mi	Alaska, USA	More
Aug 7, 1992 18:19 31 years ago	6.9 14 km	222km / 138mi	Alaska, USA	More
Nov 17, 1987 08:46 35 years ago	6.9 10 km	122km / 76mi	Alaska, USA	More
Sep 22, 1911 05:01 112 years ago	6.9 60 km	265km / 165mi	Kenai Peninsula Parish, 31 mi W of Split Island, Chugach, Alaska, USA	More
Jun 21, 1928 16:27 95 years ago	6.8 15 km	186km / 115mi	23 mi NW of Hinchinbrook Island, Chugach, Alaska, USA	More
Apr 16, 1970 05:33 53 years ago	6.7 15 km	136km / 85mi	Alaska, USA	More
Sep 27, 1949 15:30 74 years ago	6.7 50 km	236km / 146mi	29 mi SE of Seward, Kenai Peninsula, Alaska, USA	More
Jul 12, 1983 15:10 40 years ago	6.6 37 km	236km / 146mi	Valdez-Cordova Parish, 53 mi NW of Hinchinbrook Island, Chugach, Alaska, USA	More
Jan 12, 1946 20:25 77 years ago	6.6 20 km	215km / 134mi	136 mi S of Alaska City, Anchorage, Alaska, USA	More
Feb 23, 1925 23:53 98 years ago	6.6 25 km	258km / 160mi	Valdez-Cordova Parish, 62 mi E of Eagle River, Anchorage, Alaska, USA	More
Jun 27, 1965 11:08 58 years ago	6.5 15 km	227km / 141mi	282 mi NW of Juneau, Alaska, USA	More
Mar 28, 1964 20:29 59 years ago	6.5 15 km	233km / 145mi	33 mi SE of Seward, Kenai Peninsula, Alaska, USA	More
Nov 12, 2012 20:42 10 years ago	6.4 55 km	225km / 140mi	276 mi SE of Valdez, Alaska, USA	More
Sep 7, 1983 19:22 40 years ago	6.4 45 km	238km / 148mi	Valdez-Cordova Parish, 49 mi NE of Split Island, Chugach, Alaska, USA	More
Mar 30, 1964 07:09 59 years ago	6.4 10 km	76km / 47mi	48 mi SE of Hinchinbrook Island, Chugach, Alaska, USA	More
Mar 28, 1964 14:47 59 years ago	6.4 13 km	147km / 91mi	16 mi SW of Hinchinbrook Island, Chugach, Alaska, USA	More
Jan 4, 1933 03:59 90 years ago	6.4 20 km	265km / 164mi	Valdez-Cordova Parish, 55 mi E of Alaska City, Anchorage, Alaska, USA	More
Mar 28, 1964 14:49 59 years ago	6.3 13 km	149km / 93mi	18 mi SW of Hinchinbrook Island, Chugach, Alaska, USA	More
Jun 2, 1934 16:45 89 years ago	6.3 0 km	249km / 154mi	Valdez-Cordova Parish, 23 mi W of Valdez, Alaska, USA	More
Sep 14, 1932 08:43 91 years ago	6.3 50 km	257km / 160mi	57 mi E of Eagle River, Anchorage, Alaska, USA	More
Mar 6, 1988 23:14 35 years ago	6.2 10 km	232km / 144mi	Alaska, USA	More
Mar 28, 1964 09:52 59 years ago	6.2 25 km	87km / 54mi	50 mi SE of Montague Island, Chugach, Alaska, USA	More
Apr 11, 1970 04:05 53 years ago	6.1 15 km	138km / 86mi	Alaska, USA	More
Sep 30, 1965 23:47 58 years ago	6.1 20 km	50km / 31mi	241 mi SE of Alaska City, Anchorage, Alaska, USA	More
May 17, 1964 00:50 59 years ago	6.1 15 km	110km / 68mi	266 mi SE of Alaska City, Anchorage, Alaska, USA	More
Mar 28, 1964 11:08 59 years ago	6.1 20 km	213km / 132mi	Valdez-Cordova Parish, 18 mi W of Latouche Island, Valdez-Cordova, Alaska, USA	More
Jul 17, 2014 11:49 9 years ago	6.0 15 km	268km / 166mi	48 mi NW of Knight Island, Yakutat, Alaska, USA	More
Aug 18, 1970 17:52 53 years ago	6.0 25 km	146km / 91mi	North Island, 49 mi SE of Valdez, Alaska, USA	More
Nov 30, 1987 19:48 35 years ago	5.9 10 km	170km / 106mi	Alaska, USA	More
Apr 19, 1970 01:15 53 years ago	5.9 15 km	125km / 78mi	Alaska, USA	More
Sep 28, 1967 15:44 56 years ago	5.9 20 km	126km / 78mi	161 mi SE of Alaska City, Anchorage, Alaska, USA	More
Sep 16, 1964 01:50 59 years ago	5.9 20 km	147km / 91mi	Montague Island, 127 mi SE of Alaska City, Anchorage, Alaska, USA	More
Dec 1, 1987 12:03 35 years ago	5.8 10 km	198km / 123mi	Alaska, USA	More
Nov 18, 1987 13:01 35 years ago	5.8 10 km	122km / 76mi	Alaska, USA	More
Feb 24, 1970 08:05 53 years ago	5.8 15 km	79km / 49mi	Alaska, USA	More
Apr 13, 1964 12:25 59 years ago	5.8 15 km	121km / 75mi	270 mi SE of Alaska City, Anchorage, Alaska, USA	More
May 27, 1974 14:01 49 years ago	5.7 21 km	133km / 83mi	16 mi E of Hinchinbrook Island, Chugach, Alaska, USA	More
Jul 27, 1969 21:21 54 years ago	5.7 15 km	26km / 16mi	205 mi SE of Alaska City, Anchorage, Alaska, USA	More
May 1, 1964 06:01 59 years ago	5.7 20 km	136km / 84mi	Hinchinbrook Island, 42 mi S of Tatitlek, Valdez-Cordova, Alaska, USA	More
Apr 3, 1964 08:38 59 years ago	5.7 15 km	33km / 20mi	30 mi SW of Kayak Island, Valdez-Cordova, Alaska, USA	More
Mar 28, 1964 12:03 59 years ago	5.7 25 km	146km / 91mi	Hinchinbrook Island, 39 mi S of Tatitlek, Valdez-Cordova, Alaska, USA	More
Jul 25, 2009 01:43 14 years ago	5.6 10.2 km	72km / 45mi	51 mi SE of Kayak Island, Valdez-Cordova, Alaska, USA	More
May 1, 1965 21:27 58 years ago	5.6 15 km	139km / 87mi	Hinchinbrook Island, 39 mi SE of Tatitlek, Valdez-Cordova, Alaska, USA	More
Oct 10, 1964 20:06 58 years ago	5.6 15 km	147km / 91mi	14 mi E of Hinchinbrook Island, Chugach, Alaska, USA	More
Jul 11, 1964 20:25 59 years ago	5.6 20 km	86km / 54mi	50 mi SE of Montague Island, Chugach, Alaska, USA	More
May 29, 1964 10:17 59 years ago	5.6 10 km	125km / 78mi	26 mi E of Montague Island, Chugach, Alaska, USA	More
Apr 8, 1964 19:50 59 years ago	5.6 15 km	135km / 84mi	15 mi E of Hinchinbrook Island, Chugach, Alaska, USA	More
Apr 5, 1964 19:28 59 years ago	5.6 15 km	149km / 92mi	14 mi E of Montague Island, Chugach, Alaska, USA	More
Mar 28, 1964 05:33 59 years ago	5.6 20 km	120km / 75mi	23 mi S of Hinchinbrook Island, Chugach, Alaska, USA	More
Dec 15, 1987 15:11 35 years ago	5.5 10 km	127km / 79mi	Alaska, USA	More
Nov 17, 1987 09:38 35 years ago	5.5 10 km	128km / 80mi	Alaska, USA	More
Sep 20, 1984 04:17 39 years ago	5.5 18 km	132km / 82mi	16 mi E of Hinchinbrook Island, Chugach, Alaska, USA	More
Aug 11, 1965 18:29 58 years ago	5.5 15 km	66km / 41mi	183 mi SE of Alaska City, Anchorage, Alaska, USA	More
Mar 1, 2000 23:05 23 years ago	5.4 10 km	116km / 72mi	23 mi SE of Hinchinbrook Island, Chugach, Alaska, USA	More
Jun 6, 1995 04:04 28 years ago	5.4 15 km	139km / 86mi	Hinchinbrook Island, 135 mi SE of Alaska City, Anchorage, Alaska, USA	More
Mar 10, 1988 04:16 35 years ago	5.4 10 km	34km / 21mi	Alaska, USA	More
Dec 3, 1987 09:20 35 years ago	5.4 10 km	155km / 96mi	Alaska, USA	More
Dec 2, 1987 01:53 35 years ago	5.4 10 km	123km / 77mi	Alaska, USA	More
Nov 18, 1987 06:18 35 years ago	5.4 10 km	99km / 62mi	Alaska, USA	More
Sep 4, 1980 10:53 43 years ago	5.4 33 km	67km / 42mi	Alaska, USA	More
Nov 27, 2017 22:18 5 years ago	5.3 16 km	200km / 124mi	32 mi N of Montague Island, Chugach, Alaska, USA	More
Nov 30, 1987 23:48 35 years ago	5.3 10 km	172km / 107mi	Alaska, USA	More
Sep 18, 1965 20:46 58 years ago	5.3 5 km	19km / 12mi	46 mi SW of Kayak Island, Valdez-Cordova, Alaska, USA	More
Dec 2, 1987 05:13 35 years ago	5.2 10 km	150km / 93mi	Alaska, USA	More
Dec 21, 2004 17:21 18 years ago	5.1 11 km	197km / 123mi	23 mi NE of Split Island, Chugach, Alaska, USA	More
Jul 27, 1993 11:44 30 years ago	5.1 10 km	27km / 17mi	Alaska, USA	More
Feb 25, 1990 01:43 33 years ago	5.1 10 km	147km / 91mi	Alaska, USA	More
Sep 20, 1984 04:28 39 years ago	5.1 26 km	133km / 83mi	13 mi E of Hinchinbrook Island, Chugach, Alaska, USA	More
Jan 9, 1973 11:57 50 years ago	5.1 18 km	131km / 81mi	17 mi E of Hinchinbrook Island, Chugach, Alaska, USA	More
Apr 9, 1964 13:06 59 years ago	5.1 18 km	74km / 46mi	22 mi W of Kayak Island, Valdez-Cordova, Alaska, USA	More
Apr 4, 1964 22:16 59 years ago	5.1 10 km	19km / 12mi	50 mi SW of Kayak Island, Valdez-Cordova, Alaska, USA	More
Feb 27, 2000 02:22 23 years ago	5.0 18 km	118km / 73mi	22 mi SE of Hinchinbrook Island, Chugach, Alaska, USA	More
Jan 30, 1997 05:28 26 years ago	5.0 10 km	6km / 4mi	Alaska, USA	More
Feb 15, 1988 19:16 35 years ago	5.0 10 km	124km / 77mi	Alaska, USA	More
Nov 18, 1987 07:13 35 years ago	5.0 10 km	108km / 67mi	Alaska, USA	More
Aug 9, 1983 15:58 40 years ago	5.0 28 km	160km / 99mi	Montague Island, 118 mi SE of Alaska City, Anchorage, Alaska, USA	More
Apr 2, 1964 22:34 59 years ago	5.0 22 km	74km / 46mi	16 mi SE of Kayak Island, Valdez-Cordova, Alaska, USA	More
May 2, 2016 13:38 7 years ago	4.9 30 km	21km / 13mi	37 mi S of Kayak Island, Valdez-Cordova, Alaska, USA	More
May 3, 1989 02:56 34 years ago	4.9 8.2 km	150km / 93mi	13 mi E of Montague Island, Chugach, Alaska, USA	More
Aug 13, 1988 18:43 35 years ago	4.9 15 km	128km / 79mi	25 mi S of Hinchinbrook Island, Chugach, Alaska, USA	More
Jan 26, 1988 13:58 35 years ago	4.9 10 km	171km / 106mi	Alaska, USA	More
Nov 30, 1987 20:15 35 years ago	4.9 10 km	125km / 77mi	Alaska, USA	More
Aug 28, 1974 18:43 49 years ago	4.9 4 km	39km / 24mi	Alaska, USA	More
Jan 25, 2021 22:02 2 years ago	4.8 17 km	122km / 76mi	20 mi SE of Hinchinbrook Island, Chugach, Alaska, USA	More
Aug 27, 2014 06:10 9 years ago	4.8 12 km	36km / 23mi	203 mi SE of Alaska City, Anchorage, Alaska, USA	More
May 11, 2008 04:03 15 years ago	4.8 5 km	45km / 28mi	32 mi SW of Kayak Island, Valdez-Cordova, Alaska, USA	More
Dec 26, 1987 00:01 35 years ago	4.8 10 km	156km / 97mi	Alaska, USA	More
Dec 8, 1987 05:12 35 years ago	4.8 10 km	138km / 86mi	Alaska, USA	More
Oct 22, 1980 15:33 42 years ago	4.8 33 km	105km / 65mi	40 mi SE of Montague Island, Chugach, Alaska, USA	More
Jun 10, 1978 19:35 45 years ago	4.8 20 km	143km / 89mi	Hinchinbrook Island, 133 mi SE of Alaska City, Anchorage, Alaska, USA	More
Apr 8, 2007 22:09 16 years ago	4.7 6.7 km	10km / 6mi	Alaska, USA	More
Mar 23, 2001 13:38 22 years ago	4.7 8.6 km	87km / 54mi	59 mi SE of Montague Island, Chugach, Alaska, USA	More
May 31, 1991 15:39 32 years ago	4.7 10 km	99km / 61mi	Alaska, USA	More
Nov 22, 1987 15:28 35 years ago	4.7 10 km	108km / 67mi	Alaska, USA	More
Nov 17, 1987 09:00 35 years ago	4.7 10 km	119km / 74mi	Alaska, USA	More
Oct 19, 1982 19:20 40 years ago	4.7 33 km	22km / 13mi	Alaska, USA	More

Show all

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