Earthquakes on April 21, 2026
263
EARTHQUAKES on April 21, 2026
24-hour UTC period · USGS data
LARGEST: M5.7 — Balleny Islands region
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
36
M3.0–3.9
13
M2.0–2.9
48
M1.0–1.9
160
Activity Summary
263
Total earthquakes
~250
Daily average
Normal
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.7
Balleny Islands region
10:30 UTC · 10.0 km deep
5.5
121 km E of Noda, Japan
18:44 UTC · 16.0 km deep
5.4
47 km NW of Pante Makasar, Timor Leste
03:17 UTC · 63.9 km deep
Felt by 2
5.3
142 km ENE of Miyako, Japan
05:29 UTC · 10.0 km deep
Felt by 1
5.2
4 km N of Cotacachi, Ecuador
02:22 UTC · 123.7 km deep
Felt by 11
5.0
64 km E of Wāngjing, India
00:29 UTC · 95.1 km deep
Felt by 16
4.9
12 km SSW of Santiago Quiavicuzas, Mexico
14:52 UTC · 73.1 km deep
Felt by 4
4.8
southeast of the Loyalty Islands
11:03 UTC · 10.0 km deep
Earthquake Map — April 21, 2026
All Earthquakes — April 21, 2026
Showing 30 of 103 (filtered from 263)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-04-21 2026-04-21 23:31:12 UTC | 4.4mb | 96 km SSW of Kokopo, Papua New Guinea -5.135°, 151.910° | 61.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 96 km SSW of Kokopo, Papua New Guinea on April 21, 2026 at 23:31 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 23:30:39 UTC | 4.0mb | 59 km ENE of Severo-Kuril’sk, Russia 50.795°, 156.954° | 80.8 km | - | - | - | ✓ Reviewed | USGS → |
On April 21, 2026 at 23:30 UTC, a magnitude 4.0 earthquake struck 59 km ENE of Severo-Kuril’sk, Russia. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 22:00:31 UTC | 4.3mwr | 88 km W of Puerto, Chile -20.306°, -70.995° | 12.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 88 km W of Puerto, Chile on April 21, 2026 at 22:00 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 21:47:52 UTC | 2.4md | 6 km NW of The Geysers, CA 38.821°, -122.799° | 2.1 km | - | - | - | Auto | USGS → |
April 21, 2026 brought a magnitude 2.4 earthquake 6 km NW of The Geysers, CA, logged at 21:47 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 M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 21:46:19 UTC | 2.0md | 10 km ESE of Redway, CA 40.073°, -123.718° | 22.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 10 km ESE of Redway, CA came in on April 21, 2026 at 21:46 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 21:12:46 UTC | 2.0ml | 20 km SSE of Kokhanok, Alaska 59.267°, -154.627° | 276.5 km | - | - | - | Auto | USGS → |
A magnitude 2.0 seismic event took place 20 km SSE of Kokhanok, Alaska on April 21, 2026 at 21:12 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 21:10:45 UTC | 2.1ml | 11 km E of Pāhala, Hawaii 19.201°, -155.373° | 31.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 11 km E of Pāhala, Hawaii came in on April 21, 2026 at 21:10 UTC. It arrived roughly 8 hours after a larger magnitude 2.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 21:04:25 UTC | 3.1ml | 68 km SE of Adak, Alaska 51.383°, -176.048° | 34.3 km | - | - | - | ✓ Reviewed | USGS → |
April 21, 2026 brought a magnitude 3.1 earthquake 68 km SE of Adak, Alaska, logged at 21:04 UTC. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 21:01:53 UTC | 4.7mb | south of the Kermadec Islands -33.758°, -178.760° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
April 21, 2026 brought a magnitude 4.7 earthquake south of the Kermadec Islands, logged at 21:01 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 20:43:58 UTC | 2.0ml | 20 km N of Moose Pass, Alaska 60.667°, -149.421° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
April 21, 2026 brought a magnitude 2.0 earthquake 20 km N of Moose Pass, Alaska, logged at 20:43 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 20:18:26 UTC | 2.1ml | 56 km S of Whites City, New Mexico 31.669°, -104.293° | 7.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 56 km S of Whites City, New Mexico on April 21, 2026 at 20:18 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 20:16:18 UTC | 2.1md | 20 km N of Tofino, Canada 49.334°, -125.889° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 20 km N of Tofino, Canada at 20:16 UTC on April 21, 2026. 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. | ||||||||
2026-04-21 2026-04-21 19:49:05 UTC | 2.1ml | 108 km ENE of Chignik, Alaska 56.605°, -156.743° | 74.5 km | - | - | - | ✓ Reviewed | USGS → |
April 21, 2026 brought a magnitude 2.1 earthquake 108 km ENE of Chignik, Alaska, logged at 19:49 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 19:46:44 UTC | 4.6mb | 75 km N of Labasa, Fiji -15.752°, 179.446° | 14.7 km | - | - | - | ✓ Reviewed | USGS → |
On April 21, 2026, worldwide seismic activity registered a magnitude 4.6 earthquake 75 km N of Labasa, Fiji at 19:46 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 19:37:08 UTC | 2.9ml | 191 km S of Adak, Alaska 50.155°, -176.828° | 19.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.9 earthquake 191 km S of Adak, Alaska at 19:37 UTC on April 21, 2026. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 19:11:38 UTC | 2.0ml | 38 km WNW of Anchor Point, Alaska 59.856°, -152.506° | 78.7 km | - | - | - | ✓ Reviewed | USGS → |
On April 21, 2026 at 19:11 UTC, a magnitude 2.0 earthquake struck 38 km WNW of Anchor Point, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 18:52:21 UTC | 4.3mb | 111 km E of Noda, Japan 40.203°, 143.116° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
April 21, 2026 brought a magnitude 4.3 earthquake 111 km E of Noda, Japan, logged at 18:52 UTC. Coming 1 hours after a magnitude 5.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 18:44:09 UTC | 5.5mww | 121 km E of Noda, Japan 40.136°, 143.248° | 16.0 km | - | III | green | ✓ Reviewed | USGS → |
A magnitude 5.5 earthquake was recorded 121 km E of Noda, Japan on April 21, 2026 at 18:44 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. The event was offshore. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 18:43:01 UTC | 4.4mb | 118 km E of Noda, Japan 40.231°, 143.200° | 36.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 118 km E of Noda, Japan with origin time 18:43 UTC on April 21, 2026. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 18:08:25 UTC | 2.2ml | 25 km S of Westbrook, Texas 32.128°, -101.057° | 8.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 25 km S of Westbrook, Texas with origin time 18:08 UTC on April 21, 2026. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 18:02:39 UTC | 3.3md | 107 km N of San Juan, Puerto Rico 19.431°, -66.005° | 29.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.3 earthquake 107 km N of San Juan, Puerto Rico at 18:02 UTC on April 21, 2026. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 18:00:35 UTC | 2.5ml | 84 km SSW of Unalaska, Alaska 53.238°, -167.218° | 4.2 km | - | - | - | ✓ Reviewed | USGS → |
On April 21, 2026 at 18:00 UTC, a magnitude 2.5 earthquake struck 84 km SSW of Unalaska, 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. | ||||||||
2026-04-21 2026-04-21 17:12:24 UTC | 3.1ml | 217 km WSW of Adak, Alaska 50.856°, -179.307° | 10.3 km | - | - | - | ✓ Reviewed | USGS → |
On April 21, 2026 at 17:12 UTC, a magnitude 3.1 earthquake struck 217 km WSW of Adak, Alaska. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 17:07:29 UTC | 2.0ml | 17 km SE of Silver Springs, Nevada 39.308°, -119.074° | 10.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 17 km SE of Silver Springs, Nevada on April 21, 2026 at 17:07 UTC. Coming 10 hours after a magnitude 2.7 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. | ||||||||
2026-04-21 2026-04-21 17:06:53 UTC | 2.1ml | 61 km NNW of Yakutat, Alaska 60.026°, -140.285° | 1.9 km | - | - | - | ✓ Reviewed | USGS → |
On April 21, 2026 at 17:06 UTC, a magnitude 2.1 earthquake struck 61 km NNW of Yakutat, Alaska. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 17:03:19 UTC | 4.4mb | 93 km ENE of Hinatuan, Philippines 8.652°, 127.132° | 9.3 km | - | - | - | ✓ Reviewed | USGS → |
On April 21, 2026, worldwide seismic activity registered a magnitude 4.4 earthquake 93 km ENE of Hinatuan, Philippines at 17:03 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 16:48:46 UTC | 2.1ml | 14 km SSW of Santa Barbara, CA 34.303°, -119.744° | -0.3 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 14 km SSW of Santa Barbara, CA on April 21, 2026, with origin time 16:48 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. | ||||||||
2026-04-21 2026-04-21 16:18:54 UTC | 4.5mb | 27 km SW of Chicche, Peru -12.437°, -75.491° | 96.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake 27 km SW of Chicche, Peru at 16:18 UTC on April 21, 2026. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 16:18:12 UTC | 4.3mb | 32 km E of Noda, Japan 40.084°, 142.202° | 69.6 km | - | - | - | ✓ Reviewed | USGS → |
On April 21, 2026 at 16:18 UTC, a magnitude 4.3 earthquake struck 32 km E of Noda, Japan. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-04-21 2026-04-21 16:14:10 UTC | 2.0ml | 11 km WSW of Stanton, Texas 32.106°, -101.906° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 11 km WSW of Stanton, Texas with origin time 16:14 UTC on April 21, 2026. See the M2.0 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 April 21, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.