Earthquakes on October 16, 2021
297
EARTHQUAKES on October 16, 2021
24-hour UTC period · USGS data
10 km deep · 14 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
40
M3.0–3.9
11
M2.0–2.9
61
M1.0–1.9
182
Activity Summary
297
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Significant Earthquakes (M4.5+)
5.4
73 km SSW of George Town, Cayman Islands
18:27 UTC · 10.0 km deep
Felt by 14
5.0
North Atlantic Ocean
22:56 UTC · 10.0 km deep
5.0
South Sandwich Islands region
13:24 UTC · 10.0 km deep
4.9
southwest of Africa
17:33 UTC · 10.0 km deep
4.9
83 km ENE of Scarborough, Trinidad and Tobago
07:07 UTC · 44.3 km deep
Felt by 1
4.9
South Sandwich Islands region
02:35 UTC · 55.7 km deep
4.9
128 km ENE of Kuril’sk, Russia
02:02 UTC · 147.2 km deep
Felt by 2
4.8
99 km SSE of Hengchun, Taiwan
15:35 UTC · 10.0 km deep
Earthquake Map — October 16, 2021
All Earthquakes — October 16, 2021
Showing 30 of 115 (filtered from 297)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-10-16 2021-10-16 23:49:46 UTC | 2.6ml | 46 km WSW of Salmon, Idaho 45.079°, -114.469° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 46 km WSW of Salmon, Idaho on October 16, 2021, with origin time 23:49 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 23:43:23 UTC | 2.0md | 6 km SSW of P?hala, Hawaii 19.150°, -155.495° | 32.8 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.0 earthquake 6 km SSW of P?hala, Hawaii came in on October 16, 2021 at 23:43 UTC. Coming 1 hours after a magnitude 3.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 23:35:52 UTC | 3.0ml | 4 km S of P?hala, Hawaii 19.160°, -155.470° | 33.1 km | 3 | - | - | ✓ Reviewed | USGS → |
At 23:35 UTC on October 16, 2021, a magnitude 3.0 tremor occurred 4 km S of P?hala, Hawaii. 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 M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 23:25:40 UTC | 4.0mb | 7 km SE of Carletonville, South Africa -26.399°, 27.461° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
October 16, 2021 brought a magnitude 4.0 earthquake 7 km SE of Carletonville, South Africa, logged at 23:25 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 23:21:00 UTC | 2.4md | 1 km S of Palomas, Puerto Rico 18.002°, -66.875° | 11.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:21 UTC on October 16, 2021, a magnitude 2.4 tremor occurred 1 km S of Palomas, Puerto Rico. Coming 16 hours after a magnitude 3.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 23:14:19 UTC | 3.6md | 91 km NE of Punta Cana, Dominican Republic 19.124°, -67.750° | 56.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.6 event was detected 91 km NE of Punta Cana, Dominican Republic on October 16, 2021, with origin time 23:14 UTC. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 23:13:27 UTC | 4.4mb | 88 km NW of Neiafu, Tonga -18.087°, -174.579° | 130.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 16, 2021 at 23:13 UTC, a magnitude 4.4 earthquake struck 88 km NW of Neiafu, Tonga. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 22:56:15 UTC | 5.0mb | North Atlantic Ocean 15.494°, -49.987° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 earthquake was recorded near North Atlantic Ocean on October 16, 2021 at 22:56 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 22:55:40 UTC | 2.8ml | 10km SW of Toms Place, CA 37.495°, -118.749° | 14.0 km | 4 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 earthquake was recorded 10km SW of Toms Place, CA on October 16, 2021 at 22:55 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 22:47:00 UTC | 2.8ml | 12 km ENE of Wright, Wyoming 43.779°, -105.345° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 16, 2021 at 22:47 UTC, a magnitude 2.8 earthquake struck 12 km ENE of Wright, Wyoming. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 22:44:21 UTC | 2.1md | 7 km E of P?hala, Hawaii 19.200°, -155.406° | 31.4 km | - | - | - | Auto | USGS → |
This magnitude 2.1 event was detected 7 km E of P?hala, Hawaii on October 16, 2021, with origin time 22:44 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 16 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 22:34:15 UTC | 2.6ml | 56 km S of Whites City, New Mexico 31.664°, -104.364° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 56 km S of Whites City, New Mexico came in on October 16, 2021 at 22:34 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 22:26:37 UTC | 3.6mb | 85 km WSW of Unalaska, Alaska 53.560°, -167.710° | 113.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.6 earthquake 85 km WSW of Unalaska, Alaska came in on October 16, 2021 at 22:26 UTC. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 22:15:13 UTC | 4.7mb | off the west coast of the South Island of New Zealand -48.317°, 165.056° | 12.1 km | - | - | - | ✓ Reviewed | USGS → |
October 16, 2021 brought a magnitude 4.7 earthquake near off the west coast of the South Island of New Zealand, logged at 22:15 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 21:55:59 UTC | 2.2ml | 44 km NW of Toyah, Texas 31.614°, -104.104° | 8.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 44 km NW of Toyah, Texas on October 16, 2021 at 21:55 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 21:36:55 UTC | 2.1ml | 7 km NW of Stanley, Idaho 44.261°, -115.012° | 9.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 7 km NW of Stanley, Idaho came in on October 16, 2021 at 21:36 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 9 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 21:29:41 UTC | 2.1md | 7 km ENE of Midway, Arkansas 36.408°, -92.385° | 5.2 km | 3 | - | - | ✓ Reviewed | USGS → |
At 21:29 UTC on October 16, 2021, a magnitude 2.1 tremor occurred 7 km ENE of Midway, Arkansas. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 21:18:40 UTC | 2.1ml | 44 km NW of Toyah, Texas 31.612°, -104.107° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 44 km NW of Toyah, Texas on October 16, 2021 at 21:18 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 21:10:18 UTC | 2.5md | 6km NW of Walker, CA 38.550°, -119.525° | 4.4 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 6km NW of Walker, CA on October 16, 2021 at 21:10 UTC. 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. | ||||||||
2021-10-16 2021-10-16 20:30:30 UTC | 4.4mb | 44 km ENE of Isangel, Vanuatu -19.412°, 169.685° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 44 km ENE of Isangel, Vanuatu on October 16, 2021 at 20:30 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 20:14:46 UTC | 3.9mwr | 83 km W of Illapel, Chile -31.674°, -72.053° | 16.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 16, 2021, worldwide seismic activity registered a magnitude 3.9 earthquake 83 km W of Illapel, Chile at 20:14 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.4 earthquake that occurred about 1 hours earlier. The event was offshore. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 20:07:08 UTC | 4.2mb | 168 km ESE of San Jose Village, Northern Mariana Islands 14.153°, 146.941° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
October 16, 2021 brought a magnitude 4.2 earthquake 168 km ESE of San Jose Village, Northern Mariana Islands, logged at 20:07 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 19:57:12 UTC | 4.2mb | 215 km N of Saipan, Northern Mariana Islands 17.134°, 145.420° | 218.5 km | - | - | - | ✓ Reviewed | USGS → |
On October 16, 2021 at 19:57 UTC, a magnitude 4.2 earthquake struck 215 km N of Saipan, Northern Mariana Islands. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 19:45:23 UTC | 2.4md | 28 km WSW of Captain Cook, Hawaii 19.387°, -156.163° | 41.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.4 earthquake 28 km WSW of Captain Cook, Hawaii at 19:45 UTC on October 16, 2021. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 19:44:30 UTC | 2.3ml | 10 km SSW of Clam Gulch, Alaska 60.155°, -151.495° | 47.6 km | - | - | - | ✓ Reviewed | USGS → |
At 19:44 UTC on October 16, 2021, a magnitude 2.3 tremor occurred 10 km SSW of Clam Gulch, Alaska. It arrived roughly 2 hours after a larger magnitude 4.7 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 19:31:03 UTC | 2.0ml | Central Alaska 62.901°, -151.175° | 106.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place near Central Alaska on October 16, 2021 at 19:31 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 19:15:07 UTC | 2.1ml | 39 km W of Mentone, Texas 31.709°, -104.019° | 7.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 39 km W of Mentone, Texas with origin time 19:15 UTC on October 16, 2021. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 18:50:12 UTC | 3.0ml | 239 km SE of Chiniak, Alaska 56.029°, -149.628° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.0 earthquake 239 km SE of Chiniak, Alaska with origin time 18:50 UTC on October 16, 2021. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 18:45:01 UTC | 4.4mwr | 83 km W of Illapel, Chile -31.706°, -72.042° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 83 km W of Illapel, Chile with origin time 18:45 UTC on October 16, 2021. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-16 2021-10-16 18:34:37 UTC | 4.4mb | 77 km WNW of Arauco, Chile -36.899°, -74.067° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 16, 2021, worldwide seismic activity registered a magnitude 4.4 earthquake 77 km WNW of Arauco, Chile at 18:34 UTC. See the M4.4 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 October 16, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.