Earthquakes on April 21, 2026: 256 Worldwide, Largest M5.7

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. At a depth of 61.9 km, the event was shallow crustal. The epicenter is at -5.135°, 151.910°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
A magnitude 4.0 seismic event took place 59 km ENE of Severo-Kuril’sk, Russia on April 21, 2026 at 23:30 UTC. The event originated approximately 80.8 km below the surface, classifying it as intermediate depth. Coordinates: 50.795°, 156.954°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
Reports of a magnitude 4.3 earthquake 88 km W of Puerto, Chile came in on April 21, 2026 at 22:00 UTC. This was a shallow crustal earthquake, focused at 12.3 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at -20.306°, -70.995°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
On April 21, 2026, worldwide seismic activity registered a magnitude 2.4 earthquake 6 km NW of The Geysers, CA 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. At a depth of just 2.1 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 38.821°N, -122.799°E. The automatic solution is preliminary and may be refined as additional station data arrives. 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 →
On April 21, 2026 at 21:46 UTC, a magnitude 2.0 earthquake struck 10 km ESE of Redway, CA. The event originated approximately 22.3 km below the surface, classifying it as shallow crustal. The epicenter is at 40.073°, -123.718°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 earthquake was recorded 20 km SSE of Kokhanok, Alaska on April 21, 2026 at 21:12 UTC. This was a intermediate depth earthquake, focused at 276.5 km depth. Geolocation places the event at 59.267°N, -154.627°E. The automatic solution is preliminary and may be refined as additional station data arrives. 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 →
On April 21, 2026 at 21:10 UTC, a magnitude 2.1 earthquake struck 11 km E of Pāhala, Hawaii. Coming 8 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The hypocenter lay at 31.0 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 19.201°, -155.373°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
The USGS recorded this magnitude 3.1 earthquake 68 km SE of Adak, Alaska at 21:04 UTC on April 21, 2026. At a depth of 34.3 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 51.383°, -176.048°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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. At a depth of 10.0 km, the event was shallow crustal. The epicenter is at -33.758°, -178.760°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
Seismographs logged a magnitude 2.0 earthquake 20 km N of Moose Pass, Alaska with origin time 20:43 UTC on April 21, 2026. The hypocenter lay at 6.4 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 60.667°, -149.421°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 earthquake was recorded 56 km S of Whites City, New Mexico on April 21, 2026 at 20:18 UTC. It arrived roughly 19 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. At a depth of 7.4 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 31.669°, -104.293°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
A magnitude 2.1 seismic event took place 20 km N of Tofino, Canada on April 21, 2026 at 20:16 UTC. At a depth of just 5.0 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 49.334°N, -125.889°E. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
Seismographs logged a magnitude 2.1 earthquake 108 km ENE of Chignik, Alaska with origin time 19:49 UTC on April 21, 2026. The event originated approximately 74.5 km below the surface, classifying it as intermediate depth. Geolocation places the event at 56.605°N, -156.743°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.1 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 →
A magnitude 2.9 earthquake was recorded 191 km S of Adak, Alaska on April 21, 2026 at 19:37 UTC. This was a shallow crustal earthquake, focused at 19.9 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 50.155°, -176.828°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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, worldwide seismic activity registered a magnitude 2.0 earthquake 38 km WNW of Anchor Point, Alaska at 19:11 UTC. At a depth of 78.7 km, the event was intermediate depth. The epicenter is at 59.856°, -152.506°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-04-21 2026-04-21 18:52:17 UTC	4.4mb	124 km E of Noda, Japan 40.198°, 143.271°	10.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.4 earthquake 124 km E of Noda, Japan with origin time 18:52 UTC on April 21, 2026. This event falls inside the aftershock decay of a nearby magnitude 5.5 earthquake that occurred about 1 hours earlier. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 40.198°N, 143.271°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.4 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. On the Modified Mercalli scale, shaking reached 3.5 — considered light. It ranks as the second largest event in the current dataset. At a depth of 16.0 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 40.136°N, 143.248°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-04-21 2026-04-21 18:42:56 UTC	4.5mb	131 km ENE of Miyako, Japan 40.089°, 143.373°	10.0 km	-	-	-	✓ Reviewed	USGS →
At 18:42 UTC on April 21, 2026, a magnitude 4.5 tremor occurred 131 km ENE of Miyako, Japan. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. Coordinates: 40.089°, 143.373°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.5 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 →
This magnitude 2.2 event was detected 25 km S of Westbrook, Texas on April 21, 2026, with origin time 18:08 UTC. The hypocenter lay at 8.7 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 32.128°N, -101.057°E. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
On April 21, 2026, worldwide seismic activity registered a magnitude 3.3 earthquake 107 km N of San Juan, Puerto Rico at 18:02 UTC. This was a shallow crustal earthquake, focused at 29.6 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 19.431°N, -66.005°E. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
The USGS recorded this magnitude 2.5 earthquake 84 km SSW of Unalaska, Alaska at 18:00 UTC on April 21, 2026. At a depth of just 4.2 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. Coordinates: 53.238°, -167.218°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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	3.0ml	218 km WSW of Adak, Alaska 50.825°, -179.289°	7.1 km	-	-	-	✓ Reviewed	USGS →
April 21, 2026 brought a magnitude 3.0 earthquake 218 km WSW of Adak, Alaska, logged at 17:12 UTC. At a depth of 7.1 km, the event was shallow crustal. Geolocation places the event at 50.825°N, -179.289°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.0 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 →
At 17:07 UTC on April 21, 2026, a magnitude 2.0 tremor occurred 17 km SE of Silver Springs, Nevada. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 10 hours earlier. The event originated approximately 10.5 km below the surface, classifying it as shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 39.308°N, -119.074°E. The solution has been reviewed by a USGS seismologist and is considered finalized. 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, worldwide seismic activity registered a magnitude 2.1 earthquake 61 km NNW of Yakutat, Alaska at 17:06 UTC. At a depth of just 1.9 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. Coordinates: 60.026°, -140.285°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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. This was a shallow crustal earthquake, focused at 9.3 km depth. Coordinates: 8.652°, 127.132°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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	-	-	-	✓ Reviewed	USGS →
April 21, 2026 brought a magnitude 2.1 earthquake 14 km SSW of Santa Barbara, CA, logged at 16:48 UTC. At a depth of just -0.3 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. Coordinates: 34.303°, -119.744°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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. This was a intermediate depth earthquake, focused at 96.4 km depth. The offshore location combined with this depth is characteristic of seismicity along descending slabs. The epicenter is at -12.437°, -75.491°. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
A magnitude 4.3 seismic event took place 32 km E of Noda, Japan on April 21, 2026 at 16:18 UTC. The hypocenter lay at 69.6 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 40.084°N, 142.202°E. The solution has been reviewed by a USGS seismologist and is considered finalized. 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 →
The USGS recorded this magnitude 2.0 earthquake 11 km WSW of Stanton, Texas at 16:14 UTC on April 21, 2026. This was a shallow crustal earthquake, focused at 7.3 km depth. Coordinates: 32.106°, -101.906°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-04-21 2026-04-21 15:29:28 UTC	4.1mb	Kermadec Islands region -30.333°, 179.086°	519.6 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.1 earthquake in the Kermadec Islands region with origin time 15:29 UTC on April 21, 2026. At 519.6 km, this deep-focus earthquake originated far below the brittle crust, deep inside the mantle. Coordinates: -30.333°, 179.086°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.1 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 April 21, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.

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