Earthquakes on March 9, 2023
500
EARTHQUAKES on March 9, 2023
24-hour UTC period · USGS data
88 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
1
M4.0–4.9
22
M3.0–3.9
9
M2.0–2.9
107
M1.0–1.9
361
Activity Summary
500
Total earthquakes
~250
Daily average
Elevated
Activity level
1
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.1
89 km SSE of Panguna, Papua New Guinea
17:48 UTC · 87.6 km deep
4.7
Kermadec Islands region
13:35 UTC · 10.0 km deep
4.7
2 km ESE of Santa Ana, Mexico
12:01 UTC · 106.9 km deep
4.6
95 km NNW of Hihifo, Tonga
20:26 UTC · 111.9 km deep
4.6
94 km NE of Hihifo, Tonga
16:23 UTC · 10.0 km deep
4.6
111 km ESE of Shinmachi, Japan
14:14 UTC · 10.0 km deep
Felt by 2
4.5
Kermadec Islands region
23:15 UTC · 73.9 km deep
4.5
2 km S of Umbertide, Italy
19:08 UTC · 10.0 km deep
Felt by 5
Earthquake Map — March 9, 2023
All Earthquakes — March 9, 2023
Showing 30 of 139 (filtered from 500)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-03-09 2023-03-09 23:59:33 UTC | 2.1ml | 100 km W of Adak, Alaska 51.862°, -178.089° | 4.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 100 km W of Adak, Alaska with origin time 23:59 UTC on March 9, 2023. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 10 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:59:01 UTC | 2.1ml | 104 km W of Adak, Alaska 51.864°, -178.153° | 5.7 km | - | - | - | ✓ Reviewed | USGS → |
On March 9, 2023, worldwide seismic activity registered a magnitude 2.1 earthquake 104 km W of Adak, Alaska at 23:59 UTC. Coming 10 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:54:43 UTC | 3.5ml | 100 km W of Adak, Alaska 51.886°, -178.092° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.5 earthquake 100 km W of Adak, Alaska at 23:54 UTC on March 9, 2023. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 10 hours earlier. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:50:46 UTC | 3.3ml | 93 km W of Adak, Alaska 51.860°, -177.988° | 6.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.3 event was detected 93 km W of Adak, Alaska on March 9, 2023, with origin time 23:50 UTC. Coming 10 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:46:27 UTC | 2.3ml | 49 km ESE of Nikolski, Alaska 52.810°, -168.159° | 25.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 49 km ESE of Nikolski, Alaska at 23:46 UTC on March 9, 2023. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:42:58 UTC | 2.9ml | 101 km W of Adak, Alaska 51.866°, -178.108° | 5.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 101 km W of Adak, Alaska with origin time 23:42 UTC on March 9, 2023. Coming 10 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:38:39 UTC | 2.3ml | 100 km W of Adak, Alaska 51.841°, -178.098° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 100 km W of Adak, Alaska on March 9, 2023, with origin time 23:38 UTC. It arrived roughly 10 hours after a larger magnitude 4.0 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. | ||||||||
2023-03-09 2023-03-09 23:34:17 UTC | 4.0mwr | 14 km W of Sincik, Turkey 38.055°, 38.450° | 5.4 km | - | - | - | ✓ Reviewed | USGS → |
March 9, 2023 brought a magnitude 4.0 earthquake 14 km W of Sincik, Turkey, logged at 23:34 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 5 hours earlier. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:33:13 UTC | 2.0ml | 96 km S of Sand Point, Alaska 54.470°, -160.600° | 13.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 96 km S of Sand Point, Alaska on March 9, 2023, with origin time 23:33 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:28:15 UTC | 2.0ml | 50 km WSW of Anchor Point, Alaska 59.687°, -152.707° | 81.7 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 50 km WSW of Anchor Point, Alaska came in on March 9, 2023 at 23:28 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:16:49 UTC | 2.2ml | 100 km W of Adak, Alaska 51.864°, -178.094° | 3.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 100 km W of Adak, Alaska with origin time 23:16 UTC on March 9, 2023. It arrived roughly 10 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. | ||||||||
2023-03-09 2023-03-09 23:16:14 UTC | 2.7ml | 99 km W of Adak, Alaska 51.843°, -178.073° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 99 km W of Adak, Alaska came in on March 9, 2023 at 23:16 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 10 hours earlier. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:15:38 UTC | 2.4ml | 100 km W of Adak, Alaska 51.868°, -178.090° | -1.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 100 km W of Adak, Alaska with origin time 23:15 UTC on March 9, 2023. Coming 10 hours after a magnitude 4.0 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 M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:15:17 UTC | 4.5mb | Kermadec Islands region -28.776°, -177.716° | 73.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected in the Kermadec Islands region on March 9, 2023, with origin time 23:15 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:07:08 UTC | 2.4ml | 100 km W of Adak, Alaska 51.901°, -178.097° | 7.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.4 earthquake 100 km W of Adak, Alaska came in on March 9, 2023 at 23:07 UTC. It arrived roughly 10 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 23:00:06 UTC | 2.0ml | 101 km W of Adak, Alaska 51.856°, -178.103° | 5.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 101 km W of Adak, Alaska on March 9, 2023 at 23:00 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 9 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:58:56 UTC | 2.6ml | 85 km NNW of Karluk, Alaska 58.252°, -155.125° | 3.9 km | - | - | - | ✓ Reviewed | USGS → |
At 22:58 UTC on March 9, 2023, a magnitude 2.6 tremor occurred 85 km NNW of Karluk, Alaska. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:57:47 UTC | 3.2ml | 101 km W of Adak, Alaska 51.912°, -178.105° | 8.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.2 earthquake 101 km W of Adak, Alaska came in on March 9, 2023 at 22:57 UTC. It arrived roughly 9 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:52:04 UTC | 3.8md | Puerto Rico region 19.111°, -65.154° | 87.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:52 UTC on March 9, 2023, a magnitude 3.8 tremor occurred in the Puerto Rico region. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:49:17 UTC | 2.6ml | 78 km SSE of False Pass, Alaska 54.200°, -162.957° | 51.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 78 km SSE of False Pass, Alaska at 22:49 UTC on March 9, 2023. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:48:17 UTC | 2.3ml | 101 km W of Adak, Alaska 51.858°, -178.100° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 101 km W of Adak, Alaska came in on March 9, 2023 at 22:48 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 9 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:28:11 UTC | 2.4ml | 101 km W of Adak, Alaska 51.859°, -178.106° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 101 km W of Adak, Alaska on March 9, 2023 at 22:28 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 9 hours earlier. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:15:24 UTC | 2.7ml | 102 km W of Adak, Alaska 51.852°, -178.115° | 5.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 102 km W of Adak, Alaska on March 9, 2023 at 22:15 UTC. Coming 9 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:10:39 UTC | 2.5ml | 108 km W of Adak, Alaska 51.855°, -178.202° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 108 km W of Adak, Alaska on March 9, 2023 at 22:10 UTC. It arrived roughly 9 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:06:09 UTC | 2.2ml | 100 km W of Adak, Alaska 51.865°, -178.096° | 5.9 km | - | - | - | ✓ Reviewed | USGS → |
On March 9, 2023, worldwide seismic activity registered a magnitude 2.2 earthquake 100 km W of Adak, Alaska at 22:06 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 9 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 22:00:25 UTC | 4.3mb | south of the Fiji Islands -24.733°, 179.866° | 517.7 km | - | - | - | ✓ Reviewed | USGS → |
March 9, 2023 brought a magnitude 4.3 earthquake south of the Fiji Islands, logged at 22:00 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 21:48:47 UTC | 2.3ml | 98 km W of Adak, Alaska 51.901°, -178.064° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 98 km W of Adak, Alaska on March 9, 2023 at 21:48 UTC. Coming 8 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 21:44:41 UTC | 2.9ml | 102 km W of Adak, Alaska 51.846°, -178.128° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 9, 2023, worldwide seismic activity registered a magnitude 2.9 earthquake 102 km W of Adak, Alaska at 21:44 UTC. It arrived roughly 8 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 21:40:06 UTC | 2.1ml | 101 km W of Adak, Alaska 51.859°, -178.109° | 5.3 km | - | - | - | ✓ Reviewed | USGS → |
March 9, 2023 brought a magnitude 2.1 earthquake 101 km W of Adak, Alaska, logged at 21:40 UTC. Coming 8 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-09 2023-03-09 21:37:03 UTC | 4.3mb | 85 km SE of Kandrian, Papua New Guinea -6.771°, 150.077° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 9, 2023 at 21:37 UTC, a magnitude 4.3 earthquake struck 85 km SE of Kandrian, Papua New Guinea. The event was offshore. See the M4.3 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 March 9, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.