Earthquakes on September 24, 2021
302
EARTHQUAKES on September 24, 2021
24-hour UTC period · USGS data
LARGEST: M6.1 — 187 km WSW of Adak, Alaska
18 km deep · 7 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
34
M3.0–3.9
19
M2.0–2.9
59
M1.0–1.9
186
Activity Summary
302
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Geographic Breakdown
Top Countries (International)
Significant Earthquakes (M4.5+)
6.1
187 km WSW of Adak, Alaska
11:52 UTC · 18.0 km deep
Felt by 7
5.5
185 km WSW of Adak, Alaska
07:02 UTC · 18.0 km deep
5.4
Nicobar Islands, India region
15:04 UTC · 10.0 km deep
Felt by 1
5.3
152 km WNW of Tobelo, Indonesia
06:36 UTC · 35.8 km deep
Felt by 1
4.9
Kermadec Islands region
07:57 UTC · 10.0 km deep
4.9
27 km SSW of La Esperanza (El Zapotal), Mexico
01:59 UTC · 78.6 km deep
Felt by 4
4.8
South Sandwich Islands region
06:35 UTC · 68.9 km deep
4.8
93 km E of ‘Ohonua, Tonga
00:08 UTC · 10.0 km deep
Earthquake Map — September 24, 2021
All Earthquakes — September 24, 2021
Showing 30 of 116 (filtered from 302)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-09-24 2021-09-24 23:43:12 UTC | 4.4mb | 51 km S of Çiftlikköyü, Turkey 36.716°, 42.401° | 10.0 km | 2 | - | - | ✓ Reviewed | USGS → |
September 24, 2021 brought a magnitude 4.4 earthquake 51 km S of Çiftlikköyü, Turkey, logged at 23:43 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 23:29:07 UTC | 4.2mb | 70 km SSW of Jiquilillo, Nicaragua 12.212°, -87.798° | 20.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 24, 2021 at 23:29 UTC, a magnitude 4.2 earthquake struck 70 km SSW of Jiquilillo, Nicaragua. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 23:17:04 UTC | 3.0md | 6 km W of La Parguera, Puerto Rico 17.984°, -67.107° | 14.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 6 km W of La Parguera, Puerto Rico came in on September 24, 2021 at 23:17 UTC. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 23:16:40 UTC | 3.4md | 97 km N of Isabela, Puerto Rico 19.384°, -67.072° | 11.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.4 earthquake was recorded 97 km N of Isabela, Puerto Rico on September 24, 2021 at 23:16 UTC. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 22:56:11 UTC | 2.3ml | 37 km SSW of Los Ybanez, Texas 32.422°, -102.117° | 8.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 37 km SSW of Los Ybanez, Texas came in on September 24, 2021 at 22:56 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 22:47:12 UTC | 2.8ml | 9 km NW of Stanley, Idaho 44.287°, -115.008° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place 9 km NW of Stanley, Idaho on September 24, 2021 at 22:47 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 22:40:28 UTC | 2.0ml | 8 km ENE of P?hala, Hawaii 19.233°, -155.400° | 30.4 km | - | - | - | Auto | USGS → |
September 24, 2021 brought a magnitude 2.0 earthquake 8 km ENE of P?hala, Hawaii, logged at 22:40 UTC. It arrived roughly 18 hours after a larger magnitude 2.4 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. | ||||||||
2021-09-24 2021-09-24 22:33:42 UTC | 3.3ml | 57 km S of Whites City, New Mexico 31.669°, -104.482° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.3 earthquake 57 km S of Whites City, New Mexico with origin time 22:33 UTC on September 24, 2021. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 22:15:41 UTC | 2.0ml | 44 km NW of Ninilchik, Alaska 60.370°, -152.148° | 83.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 44 km NW of Ninilchik, Alaska on September 24, 2021 at 22:15 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 22:07:59 UTC | 4.2mb | 5 km ENE of Allangigan Primero, Philippines 17.202°, 120.536° | 39.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded 5 km ENE of Allangigan Primero, Philippines on September 24, 2021 at 22:07 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 21:48:47 UTC | 2.2ml | 3 km SSE of P?hala, Hawaii 19.169°, -155.465° | 33.8 km | - | - | - | Auto | USGS → |
A magnitude 2.2 seismic event took place 3 km SSE of P?hala, Hawaii on September 24, 2021 at 21:48 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 17 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 21:13:56 UTC | 2.7ml | 18 km E of Wright, Wyoming 43.728°, -105.262° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.7 earthquake 18 km E of Wright, Wyoming with origin time 21:13 UTC on September 24, 2021. Coming 2 hours after a magnitude 3.0 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 M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 20:47:26 UTC | 2.3ml | 6 km SSW of P?hala, Hawaii 19.155°, -155.508° | 35.4 km | - | - | - | Auto | USGS → |
This magnitude 2.3 event was detected 6 km SSW of P?hala, Hawaii on September 24, 2021, with origin time 20:47 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 16 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 20:42:58 UTC | 4.4mb | 56 km NNE of Mosquera, Colombia 2.978°, -78.258° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 24, 2021 at 20:42 UTC, a magnitude 4.4 earthquake struck 56 km NNE of Mosquera, Colombia. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 20:39:33 UTC | 2.7ml | 54 km WSW of Anchor Point, Alaska 59.615°, -152.754° | 78.1 km | - | - | - | ✓ Reviewed | USGS → |
On September 24, 2021, worldwide seismic activity registered a magnitude 2.7 earthquake 54 km WSW of Anchor Point, Alaska at 20:39 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 20:34:51 UTC | 3.2ml | 1 km NNE of Point MacKenzie, Alaska 61.374°, -149.962° | 43.3 km | 18 | II | - | ✓ Reviewed | USGS → |
This magnitude 3.2 event was detected 1 km NNE of Point MacKenzie, Alaska on September 24, 2021, with origin time 20:34 UTC. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 20:22:51 UTC | 2.0md | 7 km E of P?hala, Hawaii 19.213°, -155.406° | 31.8 km | - | - | - | Auto | USGS → |
On September 24, 2021 at 20:22 UTC, a magnitude 2.0 earthquake struck 7 km E of P?hala, Hawaii. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 15 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 20:21:39 UTC | 3.0ml | 25 km NE of Nellis Air Force Base, Nevada 36.416°, -114.865° | 9.5 km | 20 | - | - | ✓ Reviewed | USGS → |
At 20:21 UTC on September 24, 2021, a magnitude 3.0 tremor occurred 25 km NE of Nellis Air Force Base, Nevada. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 20:15:15 UTC | 2.0ml | 189 km WSW of Adak, Alaska 51.065°, -179.027° | 20.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 189 km WSW of Adak, Alaska with origin time 20:15 UTC on September 24, 2021. It arrived roughly 8 hours after a larger magnitude 6.1 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. | ||||||||
2021-09-24 2021-09-24 20:09:32 UTC | 2.5md | 2 km ENE of Maria Antonia, Puerto Rico 17.985°, -66.862° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake 2 km ENE of Maria Antonia, Puerto Rico with origin time 20:09 UTC on September 24, 2021. It arrived roughly 17 hours after a larger magnitude 2.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 19:58:59 UTC | 4.7mb | Pacific-Antarctic Ridge -59.783°, -151.213° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 seismic event took place near Pacific-Antarctic Ridge on September 24, 2021 at 19:58 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 19:43:06 UTC | 4.5mb | 148 km SW of Empaque Tarriba, Mexico 22.934°, -107.938° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 148 km SW of Empaque Tarriba, Mexico on September 24, 2021, with origin time 19:43 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 19:38:43 UTC | 2.0ml | 50 km NW of Valdez, Alaska 61.434°, -147.049° | 19.6 km | - | - | - | ✓ Reviewed | USGS → |
On September 24, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 50 km NW of Valdez, Alaska at 19:38 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 19:28:25 UTC | 3.3ml | 12 km S of Ackerly, Texas 32.414°, -101.708° | 10.6 km | 5 | - | - | ✓ Reviewed | USGS → |
On September 24, 2021, worldwide seismic activity registered a magnitude 3.3 earthquake 12 km S of Ackerly, Texas at 19:28 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 19:28:15 UTC | 3.4ml | 19km E of Ridgecrest, CA 35.605°, -117.469° | 3.8 km | 11 | III | - | ✓ Reviewed | USGS → |
September 24, 2021 brought a magnitude 3.4 earthquake 19km E of Ridgecrest, CA, logged at 19:28 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 19:18:57 UTC | 3.0ml | 60 km ENE of San Vicente, Mexico 31.447°, -115.630° | 24.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.0 earthquake 60 km ENE of San Vicente, Mexico at 19:18 UTC on September 24, 2021. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 19:05:58 UTC | 4.2mb | 260 km WNW of Haveluloto, Tonga -20.316°, -177.555° | 510.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 260 km WNW of Haveluloto, Tonga with origin time 19:05 UTC on September 24, 2021. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 18:56:56 UTC | 3.0ml | 7 km E of Wright, Wyoming 43.756°, -105.394° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.0 event was detected 7 km E of Wright, Wyoming on September 24, 2021, with origin time 18:56 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. | ||||||||
2021-09-24 2021-09-24 18:42:34 UTC | 4.4mb | South Sandwich Islands region -60.369°, -25.217° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded in the South Sandwich Islands region on September 24, 2021 at 18:42 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-24 2021-09-24 18:37:52 UTC | 2.0ml | 16 km ENE of Hebgen Lake Estates, Montana 44.805°, -110.992° | 7.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 16 km ENE of Hebgen Lake Estates, Montana on September 24, 2021 at 18:37 UTC. 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 September 24, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.