Earthquakes on May 21, 2023
387
EARTHQUAKES on May 21, 2023
24-hour UTC period · USGS data
LARGEST: M6.8 — Prince Edward Islands region
28 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
9
M4.0–4.9
56
M3.0–3.9
13
M2.0–2.9
72
M1.0–1.9
237
Activity Summary
387
Total earthquakes
~250
Daily average
Elevated
Activity level
9
M5.0+ events
Significant Earthquakes (M4.5+)
6.8
Prince Edward Islands region
14:56 UTC · 28.0 km deep
6.1
55 km WNW of Kirakira, Solomon Islands
15:45 UTC · 82.3 km deep
Felt by 8
5.7
104 km SE of Neiafu, Tonga
05:23 UTC · 16.0 km deep
5.6
108km W of Petrolia, CA
18:44 UTC · 10.0 km deep
Felt by 623
5.5
135 km WSW of Kurio, Japan
22:20 UTC · 184.0 km deep
5.4
west of Macquarie Island
21:11 UTC · 10.0 km deep
5.2
104 km SE of Neiafu, Tonga
11:26 UTC · 10.0 km deep
5.1
Prince Edward Islands region
17:23 UTC · 10.0 km deep
Earthquake Map — May 21, 2023
All Earthquakes — May 21, 2023
Showing 30 of 150 (filtered from 387)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-05-21 2023-05-21 23:44:20 UTC | 4.9mb | west of Macquarie Island -52.005°, 138.989° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
May 21, 2023 brought a magnitude 4.9 earthquake west of Macquarie Island, logged at 23:44 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 23:41:44 UTC | 2.0ml | 97 km S of False Pass, Alaska 53.984°, -163.213° | 25.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 97 km S of False Pass, Alaska on May 21, 2023 at 23:41 UTC. It arrived roughly 16 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 23:18:49 UTC | 4.1mb | 88 km E of Minami-Sōma, Japan 37.689°, 141.980° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake 88 km E of Minami-Sōma, Japan at 23:18 UTC on May 21, 2023. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 23:13:48 UTC | 2.6ml | 134 km SW of Adak, Alaska 51.203°, -178.245° | 36.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 134 km SW of Adak, Alaska on May 21, 2023 at 23:13 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 22:53:33 UTC | 2.2ml | 26 km WSW of Susitna, Alaska 61.495°, -150.991° | 72.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 26 km WSW of Susitna, Alaska on May 21, 2023 at 22:53 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 22:42:00 UTC | 2.2ml | 63 km WNW of Nanwalek, Alaska 59.563°, -152.970° | 88.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 63 km WNW of Nanwalek, Alaska with origin time 22:42 UTC on May 21, 2023. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 22:38:39 UTC | 3.3md | 59 km NNE of Luquillo, Puerto Rico 18.841°, -65.439° | 45.3 km | - | - | - | ✓ Reviewed | USGS → |
On May 21, 2023 at 22:38 UTC, a magnitude 3.3 earthquake struck 59 km NNE of Luquillo, Puerto Rico. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 22:32:07 UTC | 3.1ml | 147 km S of False Pass, Alaska 53.528°, -163.563° | 31.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.1 earthquake 147 km S of False Pass, Alaska at 22:32 UTC on May 21, 2023. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 22:28:47 UTC | 2.3ml | 52 km S of Silver Peak, Nevada 37.285°, -117.602° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
On May 21, 2023 at 22:28 UTC, a magnitude 2.3 earthquake struck 52 km S of Silver Peak, Nevada. Coming 19 hours after a magnitude 4.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 22:20:04 UTC | 5.5mww | 135 km WSW of Kurio, Japan 29.836°, 129.111° | 184.0 km | - | III | green | ✓ Reviewed | USGS → |
At 22:20 UTC on May 21, 2023, a magnitude 5.5 tremor occurred 135 km WSW of Kurio, Japan. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 21:47:34 UTC | 2.4ml | 115 km NW of Yakutat, Alaska 60.268°, -141.213° | 3.1 km | - | - | - | ✓ Reviewed | USGS → |
On May 21, 2023 at 21:47 UTC, a magnitude 2.4 earthquake struck 115 km NW of Yakutat, Alaska. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 21:45:43 UTC | 4.4mb | 68 km N of Torbat-e Jām, Iran 35.858°, 60.537° | 10.0 km | 6 | - | - | ✓ Reviewed | USGS → |
On May 21, 2023 at 21:45 UTC, a magnitude 4.4 earthquake struck 68 km N of Torbat-e Jām, Iran. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 21:31:21 UTC | 4.4mb | Balleny Islands region -62.258°, 165.212° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded in the Balleny Islands region on May 21, 2023 at 21:31 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 21:27:56 UTC | 4.1mb | Carlsberg Ridge -1.723°, 68.045° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected near Carlsberg Ridge on May 21, 2023, with origin time 21:27 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 21:11:40 UTC | 5.4mww | west of Macquarie Island -52.155°, 139.534° | 10.0 km | - | - | green | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 5.4 earthquake west of Macquarie Island at 21:11 UTC on May 21, 2023. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 20:54:34 UTC | 4.7mb | 53 km NW of Poso, Indonesia -1.099°, 120.377° | 36.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake 53 km NW of Poso, Indonesia at 20:54 UTC on May 21, 2023. It arrived roughly 3 hours after a larger magnitude 4.8 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 20:30:17 UTC | 2.1ml | 5 km SW of Volcano, Hawaii 19.409°, -155.274° | 0.5 km | - | - | - | ✓ Reviewed | USGS → |
On May 21, 2023 at 20:30 UTC, a magnitude 2.1 earthquake struck 5 km SW of Volcano, Hawaii. This event falls inside the aftershock decay of a nearby magnitude 3.1 earthquake that occurred about 18 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 20:16:21 UTC | 4.1mb | 16 km ESE of Saimbeyli, Turkey 37.918°, 36.254° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake 16 km ESE of Saimbeyli, Turkey came in on May 21, 2023 at 20:16 UTC. It arrived roughly 8 hours after a larger magnitude 4.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 20:01:37 UTC | 4.4mb | Prince Edward Islands region -43.843°, 39.315° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake in the Prince Edward Islands region with origin time 20:01 UTC on May 21, 2023. Coming 3 hours after a magnitude 5.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 19:56:44 UTC | 4.7mb | 14 km ESE of Xunchang, China 28.413°, 104.853° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected 14 km ESE of Xunchang, China on May 21, 2023, with origin time 19:56 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 19:51:01 UTC | 2.0ml | 8 km SE of Gardendale, Texas 31.969°, -102.314° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 8 km SE of Gardendale, Texas with origin time 19:51 UTC on May 21, 2023. In the 72 hours after this event, the USGS recorded 4 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 19:48:46 UTC | 2.2ml | 63 km ENE of Big Pine, CA 37.277°, -117.594° | 4.9 km | - | - | - | ✓ Reviewed | USGS → |
On May 21, 2023 at 19:48 UTC, a magnitude 2.2 earthquake struck 63 km ENE of Big Pine, CA. It arrived roughly 16 hours after a larger magnitude 4.3 mainshock in the same 20 km area, placing it within the typical aftershock window. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 19:43:39 UTC | 2.3md | 1 km NNE of Indios, Puerto Rico 18.011°, -66.814° | 17.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 1 km NNE of Indios, Puerto Rico on May 21, 2023 at 19:43 UTC. It arrived roughly 13 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 19:38:01 UTC | 2.5ml | 112 km SE of Atka, Alaska 51.526°, -172.975° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 112 km SE of Atka, Alaska on May 21, 2023, with origin time 19:38 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 19:19:27 UTC | 4.2mb | 5 km WSW of Güepsa, Colombia 6.011°, -73.620° | 129.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded 5 km WSW of Güepsa, Colombia on May 21, 2023 at 19:19 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 19:02:01 UTC | 2.9md | 80km W of Petrolia, CA 40.382°, -125.231° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 80km W of Petrolia, CA on May 21, 2023 at 19:02 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 18:53:21 UTC | 5.0mb | 57 km NNW of Finschhafen, Papua New Guinea -6.084°, 147.638° | 95.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 seismic event took place 57 km NNW of Finschhafen, Papua New Guinea on May 21, 2023 at 18:53 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 18:51:01 UTC | 2.0ml | 58 km WNW of Ninilchik, Alaska 60.213°, -152.661° | 108.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On May 21, 2023, worldwide seismic activity registered a magnitude 2.0 earthquake 58 km WNW of Ninilchik, Alaska at 18:51 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 18:44:01 UTC | 5.6mw | 108km W of Petrolia, CA 40.377°, -125.563° | 10.0 km | 623 | III | green | ✓ Reviewed | USGS → |
On May 21, 2023, worldwide seismic activity registered a magnitude 5.6 earthquake 108km W of Petrolia, CA at 18:44 UTC. A tsunami evaluation was automatically initiated given the magnitude and location. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-05-21 2023-05-21 18:39:37 UTC | 4.3mb | 61 km ESE of Pimampiro, Ecuador 0.121°, -77.458° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 61 km ESE of Pimampiro, Ecuador on May 21, 2023 at 18:39 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
Legend:
Mag: Magnitude (magType = ml, mb, mw, etc.)
Felt: Number of DYFI felt reports
MMI: Modified Mercalli Intensity (I-X+)
Alert: PAGER alert level
Depth: Shallow (<70km), Intermediate, Deep (>300km)
Status: Auto = preliminary, Reviewed = verified by seismologist
Click any row to see additional technical details.
About This Page
This page shows all earthquakes recorded by the USGS Earthquake Hazards Program during the 24-hour UTC period on May 21, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.