Earthquakes on May 20, 2021
227
EARTHQUAKES on May 20, 2021
24-hour UTC period · USGS data
LARGEST: M5.7 — Crozet Islands region
10 km deep · 1 person felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
34
M3.0–3.9
6
M2.0–2.9
52
M1.0–1.9
131
Activity Summary
227
Total earthquakes
~250
Daily average
Normal
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.7
Crozet Islands region
17:05 UTC · 10.0 km deep
Felt by 1
5.2
49 km ENE of Calama, Chile
18:27 UTC · 114.8 km deep
Felt by 2
5.0
West Chile Rise
21:01 UTC · 10.0 km deep
5.0
111 km ENE of ‘Ohonua, Tonga
06:24 UTC · 10.0 km deep
4.9
Mid-Indian Ridge
22:25 UTC · 10.0 km deep
4.9
New Britain region, Papua New Guinea
17:15 UTC · 10.0 km deep
4.9
217 km NE of Lospalos, Timor Leste
15:27 UTC · 163.6 km deep
4.9
southern East Pacific Rise
06:59 UTC · 10.0 km deep
Earthquake Map — May 20, 2021
All Earthquakes — May 20, 2021
Showing 30 of 96 (filtered from 227)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-05-20 2021-05-20 23:44:45 UTC | 2.0md | 18km WNW of Round Mountain, CA 40.864°, -122.144° | 13.2 km | - | - | - | ✓ Reviewed | USGS → |
On May 20, 2021 at 23:44 UTC, a magnitude 2.0 earthquake struck 18km WNW of Round Mountain, CA. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 22:25:39 UTC | 4.9mb | Mid-Indian Ridge -33.443°, 77.879° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:25 UTC on May 20, 2021, a magnitude 4.9 tremor occurred near Mid-Indian Ridge. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 22:24:55 UTC | 2.2ml | 19 km WNW of Stanley, Idaho 44.274°, -115.164° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:24 UTC on May 20, 2021, a magnitude 2.2 tremor occurred 19 km WNW of Stanley, Idaho. Coming 11 hours after a magnitude 2.4 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. | ||||||||
2021-05-20 2021-05-20 22:24:34 UTC | 2.9ml | 28 km NNW of P?hala, Hawaii 19.441°, -155.583° | 15.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 28 km NNW of P?hala, Hawaii on May 20, 2021 at 22:24 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 22:16:09 UTC | 4.2mb | 6 km SW of Kuroiso, Japan 36.923°, 139.996° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
May 20, 2021 brought a magnitude 4.2 earthquake 6 km SW of Kuroiso, Japan, logged at 22:16 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 22:06:03 UTC | 2.1ml | 68 km ESE of Denali National Park, Alaska 63.225°, -150.550° | 131.9 km | - | - | - | Auto | USGS → |
On May 20, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 68 km ESE of Denali National Park, Alaska at 22:06 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 22:03:01 UTC | 2.3md | 7 km SE of Marston, Missouri 36.466°, -89.559° | 9.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded 7 km SE of Marston, Missouri on May 20, 2021 at 22:03 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 22:00:11 UTC | 2.5md | 5 km SE of Maria Antonia, Puerto Rico 17.945°, -66.848° | 14.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 5 km SE of Maria Antonia, Puerto Rico came in on May 20, 2021 at 22:00 UTC. It arrived roughly 20 hours after a larger magnitude 3.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 21:42:28 UTC | 4.8mb | 126 km SSW of Kokopo, Papua New Guinea -5.403°, 151.836° | 45.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.8 seismic event took place 126 km SSW of Kokopo, Papua New Guinea on May 20, 2021 at 21:42 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 21:15:57 UTC | 2.1ml | 24km NNE of Trona, CA 35.977°, -117.319° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 24km NNE of Trona, CA on May 20, 2021 at 21:15 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.6 earthquake that occurred about 20 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. | ||||||||
2021-05-20 2021-05-20 21:03:31 UTC | 4.8mb | 78 km ESE of ‘Ohonua, Tonga -21.486°, -174.208° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
May 20, 2021 brought a magnitude 4.8 earthquake 78 km ESE of ‘Ohonua, Tonga, logged at 21:03 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 21:01:27 UTC | 5.0mb | West Chile Rise -36.727°, -96.337° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.0 earthquake near West Chile Rise with origin time 21:01 UTC on May 20, 2021. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 20:53:01 UTC | 2.8ml | 104 km SSE of Sand Point, Alaska 54.513°, -159.723° | 24.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 earthquake was recorded 104 km SSE of Sand Point, Alaska on May 20, 2021 at 20:53 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 20:26:22 UTC | 2.1md | 2 km SE of P?hala, Hawaii 19.191°, -155.464° | 33.1 km | - | - | - | Auto | USGS → |
On May 20, 2021 at 20:26 UTC, a magnitude 2.1 earthquake struck 2 km SE of P?hala, Hawaii. Coming 3 hours after a magnitude 2.5 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. | ||||||||
2021-05-20 2021-05-20 20:21:30 UTC | 4.5mb | Kuril Islands 47.446°, 153.546° | 67.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected near Kuril Islands on May 20, 2021, with origin time 20:21 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 20:05:25 UTC | 3.6md | 52 km NNE of Cruz Bay, U.S. Virgin Islands 18.779°, -64.645° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
On May 20, 2021 at 20:05 UTC, a magnitude 3.6 earthquake struck 52 km NNE of Cruz Bay, U.S. Virgin Islands. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 19:49:56 UTC | 4.5mb | South Sandwich Islands region -55.509°, -29.501° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake in the South Sandwich Islands region came in on May 20, 2021 at 19:49 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 19:35:03 UTC | 4.4mb | 172 km WNW of Hihifo, Tonga -15.352°, -175.279° | 368.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 172 km WNW of Hihifo, Tonga at 19:35 UTC on May 20, 2021. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 19:24:19 UTC | 3.9ml | 75 km WSW of Adak, Alaska 51.544°, -177.589° | 67.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.9 seismic event took place 75 km WSW of Adak, Alaska on May 20, 2021 at 19:24 UTC. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 19:18:38 UTC | 4.4mb | 105 km E of Kokopo, Papua New Guinea -4.194°, 153.206° | 47.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 105 km E of Kokopo, Papua New Guinea on May 20, 2021, with origin time 19:18 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 19:02:08 UTC | 2.9md | 4 km SW of Guánica, Puerto Rico 17.943°, -66.939° | 5.0 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.9 event was detected 4 km SW of Guánica, Puerto Rico on May 20, 2021, with origin time 19:02 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.0 earthquake that occurred about 13 hours earlier. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 18:58:41 UTC | 2.9md | 14 km NW of Rincón, Puerto Rico 18.436°, -67.342° | 13.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.9 earthquake 14 km NW of Rincón, Puerto Rico came in on May 20, 2021 at 18:58 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 18:42:33 UTC | 2.0md | 6 km E of P?hala, Hawaii 19.204°, -155.418° | 36.0 km | - | - | - | Auto | USGS → |
A magnitude 2.0 earthquake was recorded 6 km E of P?hala, Hawaii on May 20, 2021 at 18:42 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 2 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 18:29:16 UTC | 2.2ml | 8 km ENE of P?hala, Hawaii 19.243°, -155.407° | 31.4 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.2 earthquake 8 km ENE of P?hala, Hawaii with origin time 18:29 UTC on May 20, 2021. It arrived roughly 1 hours after a larger magnitude 2.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 18:27:54 UTC | 5.2mww | 49 km ENE of Calama, Chile -22.209°, -68.520° | 114.8 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 5.2 earthquake was recorded 49 km ENE of Calama, Chile on May 20, 2021 at 18:27 UTC. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 18:19:00 UTC | 4.8mb | 84 km NW of Kirakira, Solomon Islands -9.927°, 161.364° | 83.5 km | 2 | - | - | ✓ Reviewed | USGS → |
On May 20, 2021 at 18:19 UTC, a magnitude 4.8 earthquake struck 84 km NW of Kirakira, Solomon Islands. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 18:00:35 UTC | 2.1ml | 13 km NNW of Point Possession, Alaska 61.032°, -150.805° | 33.5 km | - | - | - | Auto | USGS → |
At 18:00 UTC on May 20, 2021, a magnitude 2.1 tremor occurred 13 km NNW of Point Possession, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 17:53:32 UTC | 3.2ml | 115 km S of Sand Point, Alaska 54.321°, -160.833° | 7.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.2 earthquake 115 km S of Sand Point, Alaska with origin time 17:53 UTC on May 20, 2021. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 17:48:21 UTC | 2.4ml | 42 km W of Kalifornsky, Alaska 60.484°, -152.047° | 74.4 km | - | - | - | Auto | USGS → |
On May 20, 2021, worldwide seismic activity registered a magnitude 2.4 earthquake 42 km W of Kalifornsky, Alaska at 17:48 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-20 2021-05-20 17:33:34 UTC | 2.1ml | 9 km ENE of P?hala, Hawaii 19.244°, -155.402° | 31.4 km | - | - | - | Auto | USGS → |
May 20, 2021 brought a magnitude 2.1 earthquake 9 km ENE of P?hala, Hawaii, logged at 17:33 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 1 hours earlier. See the M2.1 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 20, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.