Earthquakes on March 21, 2026
238
EARTHQUAKES on March 21, 2026
24-hour UTC period · USGS data
LARGEST: M6.6 — northern Mid-Atlantic Ridge
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
8
M4.0–4.9
41
M3.0–3.9
13
M2.0–2.9
64
M1.0–1.9
112
Activity Summary
238
Total earthquakes
~250
Daily average
Normal
Activity level
8
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.6
northern Mid-Atlantic Ridge
12:16 UTC · 10.0 km deep
5.7
51 km W of Norsup, Vanuatu
03:20 UTC · 28.0 km deep
Felt by 2
5.6
82 km WNW of San Antonio de los Cobres, Argentina
10:00 UTC · 196.0 km deep
Felt by 3
5.4
84 km S of Koshima, Japan
11:12 UTC · 21.6 km deep
Felt by 1
5.4
southern East Pacific Rise
10:35 UTC · 10.0 km deep
5.1
158 km SW of Labuan, Indonesia
18:08 UTC · 10.0 km deep
Felt by 2
5.0
Kermadec Islands region
20:07 UTC · 303.1 km deep
5.0
Kermadec Islands, New Zealand
10:25 UTC · 10.0 km deep
Earthquake Map — March 21, 2026
All Earthquakes — March 21, 2026
Showing 30 of 126 (filtered from 238)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-03-21 2026-03-21 23:46:38 UTC | 2.9ml | 143 km SE of Akutan, Alaska 53.265°, -164.177° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 143 km SE of Akutan, Alaska with origin time 23:46 UTC on March 21, 2026. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 23:42:20 UTC | 2.9ml | 142 km SE of Akutan, Alaska 53.266°, -164.186° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2026, worldwide seismic activity registered a magnitude 2.9 earthquake 142 km SE of Akutan, Alaska at 23:42 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 23:25:49 UTC | 3.0ml | 35 km SSE of Wright, Wyoming 43.457°, -105.328° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2026 brought a magnitude 3.0 earthquake 35 km SSE of Wright, Wyoming, logged at 23:25 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 23:25:45 UTC | 2.4ml | 93 km SSW of Atka, Alaska 51.384°, -174.571° | 8.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 earthquake was recorded 93 km SSW of Atka, Alaska on March 21, 2026 at 23:25 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 23:09:19 UTC | 2.3md | 3 km W of Fuig, Puerto Rico 17.990°, -66.948° | 10.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 3 km W of Fuig, Puerto Rico came in on March 21, 2026 at 23:09 UTC. It arrived roughly 13 hours after a larger magnitude 2.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 23:05:39 UTC | 2.8md | 60 km W of Petrolia, CA 40.377°, -124.989° | 13.8 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2026 at 23:05 UTC, a magnitude 2.8 earthquake struck 60 km W of Petrolia, CA. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 23:04:10 UTC | 2.5ml | 14 km W of Johannesburg, CA 35.360°, -117.787° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 14 km W of Johannesburg, CA on March 21, 2026, with origin time 23:04 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 23:03:01 UTC | 4.3mb | Pulau Pulau Tanimbar, Indonesia -7.822°, 130.243° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2026, worldwide seismic activity registered a magnitude 4.3 earthquake near Pulau Pulau Tanimbar, Indonesia at 23:03 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 22:36:52 UTC | 2.4ml | 22 km ESE of Forsan, Texas 32.068°, -101.129° | 8.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 22 km ESE of Forsan, Texas with origin time 22:36 UTC on March 21, 2026. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 22:32:15 UTC | 4.2mb | 112 km WNW of Houma, Tonga -20.969°, -176.361° | 218.4 km | - | - | - | ✓ Reviewed | USGS → |
At 22:32 UTC on March 21, 2026, a magnitude 4.2 tremor occurred 112 km WNW of Houma, Tonga. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 22:25:09 UTC | 4.3mb | 88 km WSW of Buala, Solomon Islands -8.498°, 158.876° | 101.5 km | - | - | - | ✓ Reviewed | USGS → |
At 22:25 UTC on March 21, 2026, a magnitude 4.3 tremor occurred 88 km WSW of Buala, Solomon Islands. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 22:15:57 UTC | 2.9ml | 61 km WNW of Happy Valley, Alaska 60.144°, -152.772° | 113.4 km | - | - | - | ✓ Reviewed | USGS → |
At 22:15 UTC on March 21, 2026, a magnitude 2.9 tremor occurred 61 km WNW of Happy Valley, Alaska. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 21:40:08 UTC | 2.0ml | 65 km SE of Cantwell, Alaska 62.911°, -148.203° | 0.6 km | - | - | - | ✓ Reviewed | USGS → |
At 21:40 UTC on March 21, 2026, a magnitude 2.0 tremor occurred 65 km SE of Cantwell, Alaska. 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. | ||||||||
2026-03-21 2026-03-21 21:38:36 UTC | 4.5mb | Kermadec Islands region -28.763°, -176.537° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:38 UTC on March 21, 2026, a magnitude 4.5 tremor occurred in the Kermadec Islands region. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 21:32:11 UTC | 2.0ml | 20 km ENE of Chickaloon, Alaska 61.834°, -148.076° | 22.3 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.0 earthquake 20 km ENE of Chickaloon, Alaska at 21:32 UTC on March 21, 2026. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 21:13:05 UTC | 4.2mb | 46 km WSW of Jurm, Afghanistan 36.667°, 70.379° | 200.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.2 earthquake 46 km WSW of Jurm, Afghanistan at 21:13 UTC on March 21, 2026. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 20:35:51 UTC | 2.0ml | 109 km N of Yakutat, Alaska 60.525°, -139.841° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 109 km N of Yakutat, Alaska on March 21, 2026, with origin time 20:35 UTC. Coming 3 hours after a magnitude 2.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 20:07:25 UTC | 5.0mb | Kermadec Islands region -29.245°, -179.052° | 303.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 5.0 event was detected in the Kermadec Islands region on March 21, 2026, with origin time 20:07 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 20:04:55 UTC | 4.3mb | 266 km SE of Vilyuchinsk, Russia 51.204°, 161.103° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 266 km SE of Vilyuchinsk, Russia at 20:04 UTC on March 21, 2026. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 20:04:01 UTC | 4.1mb | Banda Sea -6.763°, 129.657° | 148.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.1 earthquake near Banda Sea with origin time 20:04 UTC on March 21, 2026. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 19:59:14 UTC | 3.1ml | 13 km E of Wright, Wyoming 43.752°, -105.326° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.1 earthquake 13 km E of Wright, Wyoming came in on March 21, 2026 at 19:59 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 19:53:58 UTC | 4.2mb | 128 km SSW of Luwuk, Indonesia -2.081°, 122.520° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 128 km SSW of Luwuk, Indonesia on March 21, 2026, with origin time 19:53 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 19:47:09 UTC | 4.5mb | 62 km SW of Atocha, Bolivia -21.331°, -66.649° | 228.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake 62 km SW of Atocha, Bolivia at 19:47 UTC on March 21, 2026. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 19:39:26 UTC | 2.3ml | 53 km E of Pedro Bay, Alaska 59.753°, -153.155° | 123.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 53 km E of Pedro Bay, Alaska on March 21, 2026 at 19:39 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 19:36:40 UTC | 2.4ml | 38 km ESE of Ugashik, Alaska 57.411°, -156.787° | 124.5 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2026, worldwide seismic activity registered a magnitude 2.4 earthquake 38 km ESE of Ugashik, Alaska at 19:36 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 19:14:45 UTC | 4.3mb | 43 km S of Metahāra, Ethiopia 8.509°, 39.962° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 43 km S of Metahāra, Ethiopia on March 21, 2026, with origin time 19:14 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 19:06:57 UTC | 2.3ml | 86 km SW of Adak, Alaska 51.364°, -177.586° | 28.7 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2026 brought a magnitude 2.3 earthquake 86 km SW of Adak, Alaska, logged at 19:06 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 18:23:27 UTC | 2.6ml | 36 km ENE of Ouzinkie, Alaska 58.081°, -151.965° | 1.2 km | - | - | - | ✓ Reviewed | USGS → |
At 18:23 UTC on March 21, 2026, a magnitude 2.6 tremor occurred 36 km ENE of Ouzinkie, Alaska. 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. | ||||||||
2026-03-21 2026-03-21 18:08:53 UTC | 5.1mww | 158 km SW of Labuan, Indonesia -7.550°, 105.003° | 10.0 km | 2 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 5.1 earthquake 158 km SW of Labuan, Indonesia at 18:08 UTC on March 21, 2026. The event was offshore. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-03-21 2026-03-21 18:04:52 UTC | 4.3mb | 1 km SSE of Reitano, Italy 37.956°, 14.355° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake 1 km SSE of Reitano, Italy came in on March 21, 2026 at 18:04 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 March 21, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.