Earthquakes on May 4, 2021
307
EARTHQUAKES on May 4, 2021
24-hour UTC period · USGS data
LARGEST: M5.5 — 117 km SSE of Pangai, Tonga
10 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
31
M3.0–3.9
7
M2.0–2.9
70
M1.0–1.9
195
Activity Summary
307
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Significant Earthquakes (M4.5+)
5.5
117 km SSE of Pangai, Tonga
19:51 UTC · 10.0 km deep
5.2
81 km WSW of Tobelo, Indonesia
22:59 UTC · 148.2 km deep
5.2
Vanuatu
13:33 UTC · 12.5 km deep
5.0
82 km ESE of Namie, Japan
18:10 UTC · 9.5 km deep
Felt by 1
4.9
Nicobar Islands, India region
22:31 UTC · 10.0 km deep
4.9
128 km WSW of Nikolski, Alaska
16:47 UTC · 53.5 km deep
4.8
51 km SSW of Shikotan, Russia
19:32 UTC · 54.0 km deep
4.7
6 km W of Yonakuni, Japan
16:05 UTC · 95.3 km deep
Earthquake Map — May 4, 2021
All Earthquakes — May 4, 2021
Showing 30 of 112 (filtered from 307)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-05-04 2021-05-04 23:19:05 UTC | 2.9md | 5 km WSW of Guánica, Puerto Rico 17.953°, -66.957° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
On May 4, 2021, worldwide seismic activity registered a magnitude 2.9 earthquake 5 km WSW of Guánica, Puerto Rico at 23:19 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.1 earthquake that occurred about 13 hours earlier. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 23:17:00 UTC | 2.4ml | 10 km S of Anchorage, Alaska 61.120°, -149.907° | 40.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 10 km S of Anchorage, Alaska on May 4, 2021, with origin time 23:17 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 23:02:59 UTC | 2.1ml | 40 km NNW of Stanley, Idaho 44.518°, -115.216° | 4.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 40 km NNW of Stanley, Idaho on May 4, 2021 at 23:02 UTC. 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. | ||||||||
2021-05-04 2021-05-04 22:59:11 UTC | 5.2mww | 81 km WSW of Tobelo, Indonesia 1.533°, 127.303° | 148.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.2 earthquake was recorded 81 km WSW of Tobelo, Indonesia on May 4, 2021 at 22:59 UTC. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 22:48:31 UTC | 2.1ml | 51 km SSE of Ugashik, Alaska 57.067°, -157.163° | 90.1 km | - | - | - | ✓ Reviewed | USGS → |
On May 4, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 51 km SSE of Ugashik, Alaska at 22:48 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 22:31:15 UTC | 4.9mb | Nicobar Islands, India region 8.638°, 94.192° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:31 UTC on May 4, 2021, a magnitude 4.9 tremor occurred in the Nicobar Islands, India region. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 22:28:10 UTC | 4.3mb | 66 km SSE of Kushiro, Japan 42.396°, 144.579° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake 66 km SSE of Kushiro, Japan with origin time 22:28 UTC on May 4, 2021. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 22:16:31 UTC | 2.5ml | 161 km ESE of Chignik, Alaska 55.621°, -156.105° | 4.1 km | - | - | - | ✓ Reviewed | USGS → |
On May 4, 2021 at 22:16 UTC, a magnitude 2.5 earthquake struck 161 km ESE of Chignik, Alaska. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 22:14:14 UTC | 2.8md | 8 km S of Indios, Puerto Rico 17.922°, -66.815° | 13.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 8 km S of Indios, Puerto Rico came in on May 4, 2021 at 22:14 UTC. Coming 12 hours after a magnitude 3.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 21:59:25 UTC | 2.2ml | 4 km NE of Quinton, Oklahoma 35.151°, -95.335° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 4 km NE of Quinton, Oklahoma came in on May 4, 2021 at 21:59 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 21:58:35 UTC | 3.8ml | 51 km S of Iquique, Chile -20.674°, -70.174° | 31.8 km | 5 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.8 earthquake 51 km S of Iquique, Chile at 21:58 UTC on May 4, 2021. The event was offshore. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 21:38:50 UTC | 2.8md | 35km WNW of Petrolia, CA 40.422°, -124.679° | 23.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place 35km WNW of Petrolia, CA on May 4, 2021 at 21:38 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 21:07:09 UTC | 2.2ml | southern Idaho 43.252°, -111.098° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake near southern Idaho with origin time 21:07 UTC on May 4, 2021. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 20:40:12 UTC | 2.2ml | 39 km ESE of Mina, Nevada 38.197°, -117.736° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
On May 4, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 39 km ESE of Mina, Nevada at 20:40 UTC. Coming 3 hours after a magnitude 2.6 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. | ||||||||
2021-05-04 2021-05-04 19:54:32 UTC | 4.3mb | 69 km NE of San Pedro de Atacama, Chile -22.486°, -67.698° | 187.2 km | 1 | - | - | ✓ Reviewed | USGS → |
On May 4, 2021, worldwide seismic activity registered a magnitude 4.3 earthquake 69 km NE of San Pedro de Atacama, Chile at 19:54 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 19:54:02 UTC | 2.5md | 1 km SW of Guánica, Puerto Rico 17.960°, -66.922° | 14.0 km | - | - | - | ✓ Reviewed | USGS → |
On May 4, 2021, worldwide seismic activity registered a magnitude 2.5 earthquake 1 km SW of Guánica, Puerto Rico at 19:54 UTC. It arrived roughly 10 hours after a larger magnitude 3.1 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. | ||||||||
2021-05-04 2021-05-04 19:51:42 UTC | 5.5mww | 117 km SSE of Pangai, Tonga -20.699°, -173.739° | 10.0 km | - | III | green | ✓ Reviewed | USGS → |
On May 4, 2021 at 19:51 UTC, a magnitude 5.5 earthquake struck 117 km SSE of Pangai, Tonga. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on May 4, 2021. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 19:50:23 UTC | 4.5mb | 132 km WSW of Ternate, Indonesia 0.452°, 126.246° | 43.6 km | - | - | - | ✓ Reviewed | USGS → |
On May 4, 2021 at 19:50 UTC, a magnitude 4.5 earthquake struck 132 km WSW of Ternate, Indonesia. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 19:46:32 UTC | 2.0ml | 5 km SW of Volcano, Hawaii 19.402°, -155.267° | 0.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 5 km SW of Volcano, Hawaii with origin time 19:46 UTC on May 4, 2021. 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. | ||||||||
2021-05-04 2021-05-04 19:43:45 UTC | 2.8ml | 108 km SSE of Sand Point, Alaska 54.423°, -159.903° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 108 km SSE of Sand Point, Alaska at 19:43 UTC on May 4, 2021. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 19:32:59 UTC | 4.8mb | 51 km SSW of Shikotan, Russia 43.375°, 146.475° | 54.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.8 event was detected 51 km SSW of Shikotan, Russia on May 4, 2021, with origin time 19:32 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 19:23:52 UTC | 2.6ml | 7km WSW of Hermosa Beach, CA 33.837°, -118.467° | 12.9 km | 115 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 seismic event took place 7km WSW of Hermosa Beach, CA on May 4, 2021 at 19:23 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 19:20:46 UTC | 4.2mb | 288 km WSW of Tual, Indonesia -6.616°, 130.344° | 92.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 seismic event took place 288 km WSW of Tual, Indonesia on May 4, 2021 at 19:20 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 18:10:43 UTC | 5.0mww | 82 km ESE of Namie, Japan 37.186°, 141.852° | 9.5 km | 1 | - | - | ✓ Reviewed | USGS → |
On May 4, 2021, worldwide seismic activity registered a magnitude 5.0 earthquake 82 km ESE of Namie, Japan at 18:10 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 17:55:15 UTC | 2.1ml | 3 km NNW of Saint Maries, Idaho 47.346°, -116.576° | -0.7 km | - | - | - | ✓ Reviewed | USGS → |
May 4, 2021 brought a magnitude 2.1 earthquake 3 km NNW of Saint Maries, Idaho, logged at 17:55 UTC. 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. | ||||||||
2021-05-04 2021-05-04 17:52:56 UTC | 4.4mb | 46 km SSE of Calama, Chile -22.852°, -68.758° | 108.9 km | - | - | - | ✓ Reviewed | USGS → |
May 4, 2021 brought a magnitude 4.4 earthquake 46 km SSE of Calama, Chile, logged at 17:52 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 17:36:03 UTC | 2.6ml | 39 km SE of Mina, Nevada 38.192°, -117.732° | 6.7 km | 1 | - | - | ✓ Reviewed | USGS → |
At 17:36 UTC on May 4, 2021, a magnitude 2.6 tremor occurred 39 km SE of Mina, Nevada. In the 72 hours after this event, the USGS recorded 10 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 17:27:42 UTC | 2.1ml | 68 km W of Tyonek, Alaska 61.039°, -152.394° | 110.5 km | - | - | - | ✓ Reviewed | USGS → |
At 17:27 UTC on May 4, 2021, a magnitude 2.1 tremor occurred 68 km W of Tyonek, Alaska. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-05-04 2021-05-04 17:25:49 UTC | 2.0ml | 58 km SSE of Akutan, Alaska 53.633°, -165.505° | 52.4 km | - | - | - | ✓ Reviewed | USGS → |
At 17:25 UTC on May 4, 2021, a magnitude 2.0 tremor occurred 58 km SSE of Akutan, Alaska. Coming 16 hours after a magnitude 2.1 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. | ||||||||
2021-05-04 2021-05-04 17:00:41 UTC | 2.8ml | 60 km SSE of Sand Point, Alaska 54.867°, -160.022° | 28.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 60 km SSE of Sand Point, Alaska on May 4, 2021, with origin time 17:00 UTC. See the M2.8 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 4, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.