Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2026-09-21 2026-09-21 23:50:41 UTC	2.2ml	20 km N of Four Mile Road, Alaska 64.785°, -149.145°	0.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.2 earthquake was recorded 20 km N of Four Mile Road, Alaska on September 21, 2026 at 23:50 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 23:48:13 UTC	5.3mb	96 km S of Sarangani, Philippines 4.536°, 125.344°	10.0 km	-	-	-	✓ Reviewed	USGS →
On September 21, 2026 at 23:48 UTC, a magnitude 5.3 earthquake struck 96 km S of Sarangani, Philippines. It is the largest earthquake currently listed for worldwide seismic activity on September 21, 2026. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 23:39:42 UTC	2.5ml	23 km NE of Hawthorne, Nevada 38.698°, -118.475°	8.4 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.5 earthquake was recorded 23 km NE of Hawthorne, Nevada on September 21, 2026 at 23:39 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 23:29:21 UTC	3.3ml	40 km SE of Akutan, Alaska 53.883°, -165.330°	68.7 km	-	I	-	✓ Reviewed	USGS →
On September 21, 2026 at 23:29 UTC, a magnitude 3.3 earthquake struck 40 km SE of Akutan, Alaska. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 23:15:33 UTC	4.4mb	23 km SSW of Roncesvalles, Colombia 3.816°, -75.682°	13.3 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.4 event was detected 23 km SSW of Roncesvalles, Colombia on September 21, 2026, with origin time 23:15 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 23:14:44 UTC	2.5ml	17 km NNE of Arctic Village, Alaska 68.262°, -145.326°	7.1 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 2.5 earthquake 17 km NNE of Arctic Village, Alaska came in on September 21, 2026 at 23:14 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 23:08:02 UTC	2.5md	12 km W of Lake Nacimiento, CA 35.721°, -121.017°	5.2 km	2	-	-	✓ Reviewed	USGS →
This magnitude 2.5 event was detected 12 km W of Lake Nacimiento, CA on September 21, 2026, with origin time 23:08 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 23:02:51 UTC	2.1ml	90 km SW of Adak, Alaska 51.404°, -177.708°	32.5 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.1 earthquake was recorded 90 km SW of Adak, Alaska on September 21, 2026 at 23:02 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 22:58:21 UTC	4.2mb	2 km E of Roncesvalles, Colombia 4.009°, -75.584°	10.0 km	-	-	-	✓ Reviewed	USGS →
At 22:58 UTC on September 21, 2026, a magnitude 4.2 tremor occurred 2 km E of Roncesvalles, Colombia. It arrived roughly 4 hours after a larger magnitude 4.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 22:41:51 UTC	2.3md	25 km W of Petrolia, CA 40.307°, -124.577°	9.6 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.3 earthquake was recorded 25 km W of Petrolia, CA on September 21, 2026 at 22:41 UTC. It arrived roughly 4 hours after a larger magnitude 2.8 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.
2026-09-21 2026-09-21 22:32:46 UTC	2.5ml	18 km WSW of Dutch Harbor, Alaska 53.848°, -166.821°	9.7 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.5 seismic event took place 18 km WSW of Dutch Harbor, Alaska on September 21, 2026 at 22:32 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 22:29:59 UTC	4.5mb	91 km E of Namie, Japan 37.525°, 142.036°	35.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.5 earthquake 91 km E of Namie, Japan with origin time 22:29 UTC on September 21, 2026. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 22:24:59 UTC	2.4ml	54 km W of Anchor Point, Alaska 59.851°, -152.796°	106.3 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.4 earthquake 54 km W of Anchor Point, Alaska with origin time 22:24 UTC on September 21, 2026. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 22:01:55 UTC	4.4mb	103 km SW of Brisas Barra de Suchiate, Mexico 13.813°, -92.834°	10.0 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.4 earthquake 103 km SW of Brisas Barra de Suchiate, Mexico came in on September 21, 2026 at 22:01 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 21:37:04 UTC	5.0mb	South Sandwich Islands region -56.518°, -24.161°	10.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 5.0 earthquake in the South Sandwich Islands region with origin time 21:37 UTC on September 21, 2026. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 21:17:48 UTC	2.8ml	40 km SSW of Skwentna, Alaska 61.652°, -151.660°	101.7 km	1	-	-	✓ Reviewed	USGS →
A magnitude 2.8 seismic event took place 40 km SSW of Skwentna, Alaska on September 21, 2026 at 21:17 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 21:04:55 UTC	2.0ml	79 km ENE of Adak, Alaska 52.261°, -175.667°	243.6 km	-	-	-	✓ Reviewed	USGS →
At 21:04 UTC on September 21, 2026, a magnitude 2.0 tremor occurred 79 km ENE of Adak, Alaska. It arrived roughly 19 hours after a larger magnitude 3.2 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 20:53:15 UTC	4.4mb	Fiji region -19.167°, -177.591°	583.7 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.4 seismic event took place in the Fiji region on September 21, 2026 at 20:53 UTC. 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.
2026-09-21 2026-09-21 20:34:32 UTC	4.6mb	Kermadec Islands region -28.701°, -176.441°	10.0 km	-	-	-	✓ Reviewed	USGS →
On September 21, 2026 at 20:34 UTC, a magnitude 4.6 earthquake struck in the Kermadec Islands region. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 19:54:33 UTC	2.0ml	64 km NW of Petersville, Alaska 62.916°, -151.622°	8.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.0 earthquake 64 km NW of Petersville, Alaska at 19:54 UTC on September 21, 2026. This event falls inside the aftershock decay of a nearby magnitude 2.1 earthquake that occurred about 16 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 19:39:31 UTC	2.4ml	94 km WSW of Karluk, Alaska 57.229°, -155.888°	65.8 km	-	-	-	✓ Reviewed	USGS →
On September 21, 2026, worldwide seismic activity registered a magnitude 2.4 earthquake 94 km WSW of Karluk, Alaska at 19:39 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 19:32:47 UTC	3.1ml	76 km WSW of Akhiok, Alaska 56.705°, -155.345°	42.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 3.1 earthquake 76 km WSW of Akhiok, Alaska with origin time 19:32 UTC on September 21, 2026. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 19:24:38 UTC	2.0ml	63 km NW of Petersville, Alaska 62.911°, -151.609°	2.6 km	-	-	-	✓ Reviewed	USGS →
This magnitude 2.0 event was detected 63 km NW of Petersville, Alaska on September 21, 2026, with origin time 19:24 UTC. Coming 15 hours after a magnitude 2.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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.
2026-09-21 2026-09-21 18:58:13 UTC	2.6ml	3 km SW of Pāhala, Hawaii 19.180°, -155.508°	31.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.6 earthquake 3 km SW of Pāhala, Hawaii at 18:58 UTC on September 21, 2026. Coming 5 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 18:54:41 UTC	2.8md	19 km WSW of Petrolia, CA 40.284°, -124.505°	7.0 km	2	-	-	✓ Reviewed	USGS →
September 21, 2026 brought a magnitude 2.8 earthquake 19 km WSW of Petrolia, CA, logged at 18:54 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 18:48:44 UTC	4.5mb	1 km SE of San Antonio, Colombia 3.903°, -75.469°	10.0 km	1	-	-	✓ Reviewed	USGS →
On September 21, 2026, worldwide seismic activity registered a magnitude 4.5 earthquake 1 km SE of San Antonio, Colombia at 18:48 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 18:26:49 UTC	3.8ml	163 km S of Akhiok, Alaska 55.479°, -154.076°	20.0 km	-	I	-	✓ Reviewed	USGS →
On September 21, 2026, worldwide seismic activity registered a magnitude 3.8 earthquake 163 km S of Akhiok, Alaska at 18:26 UTC. The event was offshore. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 18:14:09 UTC	2.1ml	93 km E of King Salmon, Alaska 58.584°, -155.064°	136.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.1 earthquake 93 km E of King Salmon, Alaska with origin time 18:14 UTC on September 21, 2026. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 17:38:42 UTC	4.5mb	116 km SE of Ollagüe, Chile -22.043°, -67.539°	193.2 km	-	-	-	✓ Reviewed	USGS →
At 17:38 UTC on September 21, 2026, a magnitude 4.5 tremor occurred 116 km SE of Ollagüe, Chile. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-09-21 2026-09-21 17:33:36 UTC	4.2mb	231 km SW of Merizo Village, Guam 11.689°, 143.267°	10.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.2 earthquake 231 km SW of Merizo Village, Guam at 17:33 UTC on September 21, 2026. The event was offshore. See the M4.2 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 September 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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