Earthquakes on May 31, 2021
487
EARTHQUAKES on May 31, 2021
24-hour UTC period · USGS data
LARGEST: M6.1 — 73 km N of Chickaloon, Alaska
44 km deep · 4,618 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
46
M3.0–3.9
19
M2.0–2.9
99
M1.0–1.9
319
Activity Summary
487
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.1
73 km N of Chickaloon, Alaska
06:59 UTC · 44.0 km deep
Felt by 4,618
5.2
off the east coast of Honshu, Japan
22:04 UTC · 10.0 km deep
5.2
northern Mid-Atlantic Ridge
14:38 UTC · 10.0 km deep
5.2
101 km NNW of Nuku‘alofa, Tonga
00:48 UTC · 137.4 km deep
4.9
Pacific-Antarctic Ridge
05:42 UTC · 10.0 km deep
4.9
75 km W of Te Anau, New Zealand
04:09 UTC · 24.4 km deep
Felt by 15
4.8
northern Mid-Atlantic Ridge
14:44 UTC · 10.0 km deep
4.8
293 km SW of Severo-Kuril’sk, Russia
02:55 UTC · 160.3 km deep
Earthquake Map — May 31, 2021
All Earthquakes — May 31, 2021
Showing 30 of 168 (filtered from 487)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-05-31 2021-05-31 23:57:10 UTC | 3.4md | 3 km NNW of La Parguera, Puerto Rico 18.005°, -67.063° | 6.0 km | 6 | II | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.4 earthquake 3 km NNW of La Parguera, Puerto Rico with origin time 23:57 UTC on May 31, 2021. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 23:54:58 UTC | 3.4ml | 82 km SW of Adak, Alaska 51.414°, -177.572° | 45.3 km | - | - | - | ✓ Reviewed | USGS → |
At 23:54 UTC on May 31, 2021, a magnitude 3.4 tremor occurred 82 km SW of Adak, Alaska. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 22:53:24 UTC | 2.6md | 4 km SW of Summit, South Carolina 33.892°, -81.448° | 1.7 km | 326 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 4 km SW of Summit, South Carolina on May 31, 2021, with origin time 22:53 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 22:19:44 UTC | 2.0ml | 37 km SE of Mina, Nevada 38.148°, -117.819° | 3.4 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.0 earthquake 37 km SE of Mina, Nevada at 22:19 UTC on May 31, 2021. Coming 3 hours after a magnitude 2.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 22:17:03 UTC | 2.2md | 6 km SSE of P?hala, Hawaii 19.144°, -155.460° | 35.3 km | - | - | - | Auto | USGS → |
On May 31, 2021 at 22:17 UTC, a magnitude 2.2 earthquake struck 6 km SSE of P?hala, Hawaii. Coming 6 hours after a magnitude 3.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 22:08:27 UTC | 2.0ml | 19km S of Trona, CA 35.591°, -117.392° | 8.2 km | - | - | - | ✓ Reviewed | USGS → |
On May 31, 2021 at 22:08 UTC, a magnitude 2.0 earthquake struck 19km S of Trona, CA. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 22:04:42 UTC | 5.2mww | off the east coast of Honshu, Japan 33.162°, 142.637° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.2 earthquake was recorded near off the east coast of Honshu, Japan on May 31, 2021 at 22:04 UTC. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 22:01:26 UTC | 4.4mb | 65 km NNW of Bukittinggi, Indonesia 0.214°, 100.096° | 31.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 65 km NNW of Bukittinggi, Indonesia on May 31, 2021 at 22:01 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 21:57:25 UTC | 2.1ml | 68 km N of Chickaloon, Alaska 62.402°, -148.260° | 42.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 68 km N of Chickaloon, Alaska came in on May 31, 2021 at 21:57 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.1 earthquake that occurred about 15 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 21:41:30 UTC | 4.4mb | Guam region 13.934°, 144.892° | 138.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake in the Guam region with origin time 21:41 UTC on May 31, 2021. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 21:37:41 UTC | 2.1md | 7 km ENE of P?hala, Hawaii 19.241°, -155.416° | 32.2 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.1 earthquake 7 km ENE of P?hala, Hawaii at 21:37 UTC on May 31, 2021. Coming 6 hours after a magnitude 3.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 19:49:34 UTC | 4.4mb | 53 km SSE of Mawlaik, Myanmar 23.238°, 94.695° | 111.5 km | - | - | - | ✓ Reviewed | USGS → |
On May 31, 2021, worldwide seismic activity registered a magnitude 4.4 earthquake 53 km SSE of Mawlaik, Myanmar at 19:49 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 19:07:39 UTC | 2.1ml | 35 km SE of Mina, Nevada 38.161°, -117.820° | 6.3 km | - | - | - | Auto | USGS → |
A magnitude 2.1 seismic event took place 35 km SE of Mina, Nevada on May 31, 2021 at 19:07 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 18:59:43 UTC | 3.4ml | 72 km SSW of Unalaska, Alaska 53.254°, -166.847° | 52.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.4 earthquake 72 km SSW of Unalaska, Alaska at 18:59 UTC on May 31, 2021. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 18:49:54 UTC | 2.0ml | 2 km ENE of Quinton, Oklahoma 35.137°, -95.346° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 2 km ENE of Quinton, Oklahoma came in on May 31, 2021 at 18:49 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 18:44:15 UTC | 2.1md | 6km WNW of The Geysers, CA 38.806°, -122.818° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
On May 31, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 6km WNW of The Geysers, CA at 18:44 UTC. 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 18:41:53 UTC | 2.3ml | 70 km N of Chickaloon, Alaska 62.421°, -148.252° | 44.7 km | - | - | - | ✓ Reviewed | USGS → |
On May 31, 2021 at 18:41 UTC, a magnitude 2.3 earthquake struck 70 km N of Chickaloon, Alaska. This event falls inside the aftershock decay of a nearby magnitude 6.1 earthquake that occurred about 12 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 18:40:57 UTC | 2.7ml | 77 km ESE of King Cove, Alaska 54.704°, -161.287° | 34.1 km | - | - | - | ✓ Reviewed | USGS → |
May 31, 2021 brought a magnitude 2.7 earthquake 77 km ESE of King Cove, Alaska, logged at 18:40 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 18:37:00 UTC | 3.4md | 6 km SW of Guánica, Puerto Rico 17.930°, -66.949° | 5.0 km | 2 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.4 earthquake 6 km SW of Guánica, Puerto Rico came in on May 31, 2021 at 18:37 UTC. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 18:05:09 UTC | 4.2mb | 172 km S of Mukalla, Yemen 13.009°, 49.436° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On May 31, 2021 at 18:05 UTC, a magnitude 4.2 earthquake struck 172 km S of Mukalla, Yemen. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 17:53:57 UTC | 4.2mb | 68 km ESE of Jiufen, Taiwan 24.841°, 122.454° | 14.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded 68 km ESE of Jiufen, Taiwan on May 31, 2021 at 17:53 UTC. Coming 12 hours after a magnitude 4.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 17:32:52 UTC | 2.0ml | 9 km ENE of P?hala, Hawaii 19.240°, -155.400° | 32.7 km | - | - | - | Auto | USGS → |
This magnitude 2.0 event was detected 9 km ENE of P?hala, Hawaii on May 31, 2021, with origin time 17:32 UTC. Coming 2 hours after a magnitude 3.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 17:32:05 UTC | 2.1ml | Central Alaska 62.439°, -148.310° | 42.8 km | - | - | - | ✓ Reviewed | USGS → |
May 31, 2021 brought a magnitude 2.1 earthquake near Central Alaska, logged at 17:32 UTC. It arrived roughly 11 hours after a larger magnitude 6.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 17:16:45 UTC | 2.0ml | Island of Hawaii, Hawaii 19.257°, -155.393° | 31.0 km | - | - | - | Auto | USGS → |
A magnitude 2.0 seismic event took place near Island of Hawaii, Hawaii on May 31, 2021 at 17:16 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.4 earthquake that occurred about 1 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 16:56:26 UTC | 2.0ml | 72 km N of Chickaloon, Alaska 62.447°, -148.316° | 42.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 72 km N of Chickaloon, Alaska on May 31, 2021, with origin time 16:56 UTC. It arrived roughly 10 hours after a larger magnitude 6.1 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. | ||||||||
2021-05-31 2021-05-31 16:56:10 UTC | 2.0ml | 71 km N of Chickaloon, Alaska 62.435°, -148.275° | 45.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 71 km N of Chickaloon, Alaska came in on May 31, 2021 at 16:56 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.1 earthquake that occurred about 10 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 16:30:03 UTC | 2.1ml | 4 km NNW of Nanwalek, Alaska 59.398°, -151.948° | 52.0 km | - | - | - | ✓ Reviewed | USGS → |
On May 31, 2021 at 16:30 UTC, a magnitude 2.1 earthquake struck 4 km NNW of Nanwalek, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 16:27:49 UTC | 2.1ml | 74 km N of Chickaloon, Alaska 62.459°, -148.266° | 45.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 74 km N of Chickaloon, Alaska on May 31, 2021 at 16:27 UTC. Coming 9 hours after a magnitude 6.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 16:08:12 UTC | 2.2ml | 75 km N of Chickaloon, Alaska 62.466°, -148.299° | 41.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 75 km N of Chickaloon, Alaska on May 31, 2021 at 16:08 UTC. It arrived roughly 9 hours after a larger magnitude 6.1 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-31 2021-05-31 16:00:52 UTC | 2.4ml | 118 km SSE of Atka, Alaska 51.152°, -173.852° | 37.1 km | - | - | - | ✓ Reviewed | USGS → |
On May 31, 2021, worldwide seismic activity registered a magnitude 2.4 earthquake 118 km SSE of Atka, Alaska at 16:00 UTC. See the M2.4 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 31, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.