Earthquakes on September 9, 2021
373
EARTHQUAKES on September 9, 2021
24-hour UTC period · USGS data
LARGEST: M5.8 — 223 km WNW of Pangai, Tonga
10 km deep · 1 person felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
11
M4.0–4.9
67
M3.0–3.9
15
M2.0–2.9
66
M1.0–1.9
214
Activity Summary
373
Total earthquakes
~250
Daily average
Elevated
Activity level
11
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.8
223 km WNW of Pangai, Tonga
04:59 UTC · 10.0 km deep
Felt by 1
5.4
Izu Islands, Japan region
04:11 UTC · 10.0 km deep
Felt by 1
5.3
South Sandwich Islands region
03:47 UTC · 43.8 km deep
5.1
154 km S of False Pass, Alaska
19:23 UTC · 10.4 km deep
Felt by 5
5.1
South Sandwich Islands region
12:58 UTC · 10.0 km deep
5.1
West Chile Rise
06:42 UTC · 10.0 km deep
5.1
South Sandwich Islands region
04:37 UTC · 10.0 km deep
5.0
51 km S of Zangguy, China
23:48 UTC · 10.0 km deep
Earthquake Map — September 9, 2021
All Earthquakes — September 9, 2021
Showing 30 of 159 (filtered from 373)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-09-09 2021-09-09 23:57:23 UTC | 2.2ml | 5 km E of P?hala, Hawaii 19.209°, -155.427° | 32.3 km | - | - | - | Auto | USGS → |
On September 9, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 5 km E of P?hala, Hawaii at 23:57 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.5 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 23:48:23 UTC | 5.0mb | 51 km S of Zangguy, China 36.819°, 78.733° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 5.0 earthquake 51 km S of Zangguy, China came in on September 9, 2021 at 23:48 UTC. The event was offshore. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 23:44:01 UTC | 3.6ml | 89 km SW of Atka, Alaska 51.585°, -175.057° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
September 9, 2021 brought a magnitude 3.6 earthquake 89 km SW of Atka, Alaska, logged at 23:44 UTC. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 23:43:19 UTC | 2.1ml | 147 km SW of Adak, Alaska 51.006°, -178.236° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 147 km SW of Adak, Alaska with origin time 23:43 UTC on September 9, 2021. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 23:43:15 UTC | 4.5mb | 30 km SE of Jurm, Afghanistan 36.681°, 71.093° | 214.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 30 km SE of Jurm, Afghanistan with origin time 23:43 UTC on September 9, 2021. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 23:24:05 UTC | 2.0ml | 45 km NW of Ninilchik, Alaska 60.327°, -152.261° | 82.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 45 km NW of Ninilchik, Alaska with origin time 23:24 UTC on September 9, 2021. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 23:23:02 UTC | 2.9ml | 126 km SW of Adak, Alaska 51.150°, -178.043° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 9, 2021, worldwide seismic activity registered a magnitude 2.9 earthquake 126 km SW of Adak, Alaska at 23:23 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 22:54:21 UTC | 2.1md | 7 km SSE of P?hala, Hawaii 19.144°, -155.453° | 32.5 km | - | - | - | Auto | USGS → |
September 9, 2021 brought a magnitude 2.1 earthquake 7 km SSE of P?hala, Hawaii, logged at 22:54 UTC. Coming 18 hours after a magnitude 3.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 22:44:08 UTC | 4.1mb | 48 km SE of Mil’kovo, Russia 54.359°, 159.104° | 136.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 earthquake was recorded 48 km SE of Mil’kovo, Russia on September 9, 2021 at 22:44 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 22:31:53 UTC | 3.1md | 0 km NNE of Central Aguirre, Puerto Rico 17.956°, -66.222° | 12.0 km | 3 | - | - | ✓ Reviewed | USGS → |
On September 9, 2021 at 22:31 UTC, a magnitude 3.1 earthquake struck 0 km NNE of Central Aguirre, Puerto Rico. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 22:04:38 UTC | 2.5ml | 12 km NE of Jal, New Mexico 32.191°, -103.092° | 5.7 km | - | - | - | ✓ Reviewed | USGS → |
On September 9, 2021, worldwide seismic activity registered a magnitude 2.5 earthquake 12 km NE of Jal, New Mexico at 22:04 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:57:56 UTC | 4.5mw | 10km SW of Petrolia, CA 40.270°, -124.381° | 32.8 km | 39 | II | green | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 10km SW of Petrolia, CA on September 9, 2021, with origin time 21:57 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 M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:56:46 UTC | 4.5mb | 221 km ENE of Levuka, Fiji -17.662°, -178.641° | 559.5 km | - | - | - | ✓ Reviewed | USGS → |
On September 9, 2021, worldwide seismic activity registered a magnitude 4.5 earthquake 221 km ENE of Levuka, Fiji at 21:56 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:54:06 UTC | 2.2ml | 57 km S of Whites City, New Mexico 31.662°, -104.309° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
At 21:54 UTC on September 9, 2021, a magnitude 2.2 tremor occurred 57 km S of Whites City, New Mexico. Coming 19 hours after a magnitude 2.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:41:56 UTC | 3.2ml | off the coast of Oregon 44.140°, -128.524° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.2 earthquake near off the coast of Oregon at 21:41 UTC on September 9, 2021. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:41:08 UTC | 4.6mb | West Chile Rise -38.088°, -93.790° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 9, 2021, worldwide seismic activity registered a magnitude 4.6 earthquake near West Chile Rise at 21:41 UTC. Coming 15 hours after a magnitude 5.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:41:07 UTC | 2.4md | 1 km S of Maria Antonia, Puerto Rico 17.963°, -66.891° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 1 km S of Maria Antonia, Puerto Rico on September 9, 2021 at 21:41 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:39:53 UTC | 2.4md | 3 km S of Maria Antonia, Puerto Rico 17.950°, -66.884° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.4 earthquake 3 km S of Maria Antonia, Puerto Rico at 21:39 UTC on September 9, 2021. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:37:35 UTC | 2.8md | 4 km SSE of Guánica, Puerto Rico 17.933°, -66.889° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 earthquake was recorded 4 km SSE of Guánica, Puerto Rico on September 9, 2021 at 21:37 UTC. Coming 1 hours after a magnitude 3.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:34:00 UTC | 2.5md | 4 km SSE of Guánica, Puerto Rico 17.933°, -66.888° | 8.0 km | 1 | - | - | ✓ Reviewed | USGS → |
At 21:34 UTC on September 9, 2021, a magnitude 2.5 tremor occurred 4 km SSE of Guánica, Puerto Rico. It arrived roughly 1 hours after a larger magnitude 3.2 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. | ||||||||
2021-09-09 2021-09-09 21:17:05 UTC | 2.2ml | 228 km W of Adak, Alaska 51.959°, -179.955° | 149.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 228 km W of Adak, Alaska at 21:17 UTC on September 9, 2021. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:15:45 UTC | 2.8ml | 64 km SE of Denali National Park, Alaska 63.100°, -150.901° | 124.0 km | 1 | - | - | ✓ Reviewed | USGS → |
September 9, 2021 brought a magnitude 2.8 earthquake 64 km SE of Denali National Park, Alaska, logged at 21:15 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 21:10:55 UTC | 2.7md | 26 km NW of Rincón, Puerto Rico 18.511°, -67.432° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.7 earthquake 26 km NW of Rincón, Puerto Rico at 21:10 UTC on September 9, 2021. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 20:57:18 UTC | 4.9mb | South Sandwich Islands region -60.276°, -26.877° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.9 earthquake was recorded in the South Sandwich Islands region on September 9, 2021 at 20:57 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 20:55:05 UTC | 2.2ml | 154 km S of False Pass, Alaska 53.475°, -163.621° | 41.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 154 km S of False Pass, Alaska on September 9, 2021, with origin time 20:55 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.1 earthquake that occurred about 2 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 20:49:26 UTC | 4.2mb | Hokkaido, Japan region 42.793°, 143.413° | 101.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.2 earthquake in the Hokkaido, Japan region came in on September 9, 2021 at 20:49 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 20:33:23 UTC | 3.2md | 4 km SSE of Guánica, Puerto Rico 17.937°, -66.893° | 7.0 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 3.2 seismic event took place 4 km SSE of Guánica, Puerto Rico on September 9, 2021 at 20:33 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 M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 20:14:23 UTC | 4.3mb | Fiji region -20.735°, -178.405° | 577.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place in the Fiji region on September 9, 2021 at 20:14 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 19:25:42 UTC | 2.9md | 8 km W of Hormigueros, Puerto Rico 18.151°, -67.206° | 11.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 8 km W of Hormigueros, Puerto Rico on September 9, 2021 at 19:25 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-09 2021-09-09 19:23:23 UTC | 5.1mww | 154 km S of False Pass, Alaska 53.470°, -163.525° | 10.4 km | 5 | II | - | ✓ Reviewed | USGS → |
On September 9, 2021, worldwide seismic activity registered a magnitude 5.1 earthquake 154 km S of False Pass, Alaska at 19:23 UTC. The event was offshore. See the M5.1 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 September 9, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.