Earthquakes on September 29, 2021
384
EARTHQUAKES on September 29, 2021
24-hour UTC period · USGS data
LARGEST: M6.1 — 243 km NNW of Nanao, Japan
364 km deep · 58 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
39
M3.0–3.9
13
M2.0–2.9
80
M1.0–1.9
250
Activity Summary
384
Total earthquakes
~250
Daily average
Elevated
Activity level
2
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
6.1
243 km NNW of Nanao, Japan
08:37 UTC · 364.0 km deep
Felt by 58
5.1
South Sandwich Islands region
05:36 UTC · 52.3 km deep
4.9
southeast of the Loyalty Islands
17:05 UTC · 10.0 km deep
4.9
28 km ESE of San Martín, Argentina
07:53 UTC · 10.0 km deep
Felt by 31
4.8
37 km SSW of Lumatil, Philippines
15:48 UTC · 35.0 km deep
Felt by 2
4.8
Fiji region
07:23 UTC · 500.2 km deep
4.8
69 km SW of Novaya Chara, Russia
03:23 UTC · 10.0 km deep
4.8
83 km WSW of Luganville, Vanuatu
00:31 UTC · 9.4 km deep
Felt by 1
Earthquake Map — September 29, 2021
All Earthquakes — September 29, 2021
Showing 30 of 134 (filtered from 384)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-09-29 2021-09-29 23:38:22 UTC | 2.0md | 3 km SSW of P?hala, Hawaii 19.170°, -155.488° | 31.4 km | - | - | - | Auto | USGS → |
On September 29, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 3 km SSW of P?hala, Hawaii at 23:38 UTC. It arrived roughly 4 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. | ||||||||
2021-09-29 2021-09-29 23:32:22 UTC | 2.3ml | 64 km SE of Denali National Park, Alaska 63.190°, -150.703° | 127.6 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2021 brought a magnitude 2.3 earthquake 64 km SE of Denali National Park, Alaska, logged at 23:32 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 23:29:19 UTC | 4.5mb | 156 km WNW of Attu Station, Alaska 53.287°, 170.964° | 30.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 156 km WNW of Attu Station, Alaska came in on September 29, 2021 at 23:29 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 23:27:39 UTC | 4.3mb | 16 km S of Mandráki, Greece 36.467°, 27.162° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2021 brought a magnitude 4.3 earthquake 16 km S of Mandráki, Greece, logged at 23:27 UTC. Coming 1 hours after a magnitude 4.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 23:07:07 UTC | 2.0md | 7km NNW of Pinnacles, CA 36.585°, -121.183° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 7km NNW of Pinnacles, CA on September 29, 2021 at 23:07 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 1 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 23:06:22 UTC | 2.0ml | 63 km WNW of Happy Valley, Alaska 60.067°, -152.838° | 111.1 km | - | - | - | ✓ Reviewed | USGS → |
At 23:06 UTC on September 29, 2021, a magnitude 2.0 tremor occurred 63 km WNW of Happy Valley, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 23:05:36 UTC | 2.0ml | 6 km E of Hope, Alaska 60.925°, -149.519° | 30.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 6 km E of Hope, Alaska at 23:05 UTC on September 29, 2021. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 22:58:29 UTC | 4.4mb | South Sandwich Islands region -58.278°, -23.065° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake in the South Sandwich Islands region at 22:58 UTC on September 29, 2021. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 22:32:32 UTC | 4.1mb | 110 km NNE of Tobelo, Indonesia 2.623°, 128.449° | 228.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place 110 km NNE of Tobelo, Indonesia on September 29, 2021 at 22:32 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 22:22:59 UTC | 4.5mb | 12 km S of Mandráki, Greece 36.503°, 27.149° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 12 km S of Mandráki, Greece on September 29, 2021 at 22:22 UTC. It arrived roughly 1 hours after a larger magnitude 4.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 22:22:17 UTC | 4.6mb | 13 km SSE of Mandráki, Greece 36.490°, 27.170° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2021 at 22:22 UTC, a magnitude 4.6 earthquake struck 13 km SSE of Mandráki, Greece. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 22:20:35 UTC | 2.8md | 6km NW of Pinnacles, CA 36.579°, -121.184° | 8.0 km | 2 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 6km NW of Pinnacles, CA came in on September 29, 2021 at 22:20 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 22:14:41 UTC | 4.4mb | 126 km NNW of Nago, Japan 27.714°, 127.657° | 135.1 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 126 km NNW of Nago, Japan on September 29, 2021, with origin time 22:14 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 21:54:35 UTC | 4.1mb | south of the Fiji Islands -24.201°, -179.864° | 539.2 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2021 brought a magnitude 4.1 earthquake south of the Fiji Islands, logged at 21:54 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 21:15:55 UTC | 2.0md | 4 km SSW of P?hala, Hawaii 19.167°, -155.487° | 35.7 km | - | - | - | Auto | USGS → |
September 29, 2021 brought a magnitude 2.0 earthquake 4 km SSW of P?hala, Hawaii, logged at 21:15 UTC. Coming 2 hours after a magnitude 2.4 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. | ||||||||
2021-09-29 2021-09-29 20:38:06 UTC | 4.2mb | Fiji region -21.711°, -179.113° | 599.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded in the Fiji region on September 29, 2021 at 20:38 UTC. 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. | ||||||||
2021-09-29 2021-09-29 20:25:43 UTC | 2.2md | 32km SE of Markleeville, CA 38.509°, -119.516° | 5.5 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2021 brought a magnitude 2.2 earthquake 32km SE of Markleeville, CA, logged at 20:25 UTC. It arrived roughly 8 hours after a larger magnitude 3.3 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 20:13:59 UTC | 2.0ml | 16 km NNW of Toyah, Texas 31.441°, -103.891° | 4.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 16 km NNW of Toyah, Texas on September 29, 2021, with origin time 20:13 UTC. 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. | ||||||||
2021-09-29 2021-09-29 20:04:03 UTC | 2.1md | 13km SSE of Bodie, CA 38.107°, -118.950° | 8.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 13km SSE of Bodie, CA with origin time 20:04 UTC on September 29, 2021. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 20:02:51 UTC | 3.0ml | 55 km NW of Toyah, Texas 31.649°, -104.229° | 6.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 earthquake was recorded 55 km NW of Toyah, Texas on September 29, 2021 at 20:02 UTC. It arrived roughly 13 hours after a larger magnitude 4.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 19:36:02 UTC | 2.4ml | 5 km E of P?hala, Hawaii 19.205°, -155.430° | 32.9 km | - | - | - | Auto | USGS → |
On September 29, 2021, worldwide seismic activity registered a magnitude 2.4 earthquake 5 km E of P?hala, Hawaii at 19:36 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 M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 19:31:00 UTC | 2.0ml | 5 km SSE of P?hala, Hawaii 19.163°, -155.456° | 30.6 km | - | - | - | Auto | USGS → |
On September 29, 2021 at 19:31 UTC, a magnitude 2.0 earthquake struck 5 km SSE of P?hala, Hawaii. It arrived roughly 16 hours after a larger magnitude 2.3 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. | ||||||||
2021-09-29 2021-09-29 19:08:28 UTC | 2.1md | 5 km SSW of P?hala, Hawaii 19.161°, -155.496° | 34.5 km | - | - | - | Auto | USGS → |
On September 29, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 5 km SSW of P?hala, Hawaii at 19:08 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.3 earthquake that occurred about 16 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 19:07:57 UTC | 2.6ml | 50 km E of Juneau, Alaska 58.294°, -133.557° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2021, worldwide seismic activity registered a magnitude 2.6 earthquake 50 km E of Juneau, Alaska at 19:07 UTC. It arrived roughly 15 hours after a larger magnitude 3.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 19:05:14 UTC | 4.2mb | 108 km ENE of Tobelo, Indonesia 1.922°, 128.964° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 108 km ENE of Tobelo, Indonesia with origin time 19:05 UTC on September 29, 2021. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 18:58:58 UTC | 3.7md | 41 km NNE of Punta Cana, Dominican Republic 18.938°, -68.278° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
At 18:58 UTC on September 29, 2021, a magnitude 3.7 tremor occurred 41 km NNE of Punta Cana, Dominican Republic. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 18:30:08 UTC | 2.0md | 14km SSE of Tres Pinos, CA 36.664°, -121.288° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 14km SSE of Tres Pinos, CA came in on September 29, 2021 at 18:30 UTC. 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. | ||||||||
2021-09-29 2021-09-29 18:17:31 UTC | 2.3ml | 6 km S of Volcano, Hawaii 19.384°, -155.244° | 1.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 6 km S of Volcano, Hawaii came in on September 29, 2021 at 18:17 UTC. It arrived roughly 9 hours after a larger magnitude 2.9 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-29 2021-09-29 18:15:50 UTC | 2.1md | 30km SSW of Smith Valley, NV 38.544°, -119.496° | 7.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 30km SSW of Smith Valley, NV on September 29, 2021, with origin time 18:15 UTC. Coming 6 hours after a magnitude 3.3 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. | ||||||||
2021-09-29 2021-09-29 17:55:34 UTC | 2.4ml | 60 km SE of Perryville, Alaska 55.465°, -158.589° | 10.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 60 km SE of Perryville, Alaska with origin time 17:55 UTC on September 29, 2021. The event was offshore. See the M2.4 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 September 29, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.