Earthquakes on September 29, 2020
305
EARTHQUAKES on September 29, 2020
24-hour UTC period · USGS data
LARGEST: M5.1 — 93 km NNW of Hihifo, Tonga
10 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
42
M3.0–3.9
14
M2.0–2.9
63
M1.0–1.9
183
Activity Summary
305
Total earthquakes
~250
Daily average
Elevated
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.1
93 km NNW of Hihifo, Tonga
19:01 UTC · 10.0 km deep
5.1
107 km E of Yigo Village, Guam
01:03 UTC · 10.0 km deep
Felt by 1
5.0
south of the Kermadec Islands
00:17 UTC · 10.0 km deep
4.9
126 km SSW of Komodo, Indonesia
17:55 UTC · 10.0 km deep
4.9
Volcano Islands, Japan region
04:38 UTC · 66.6 km deep
4.9
50 km W of Sem?rom, Iran
04:08 UTC · 10.0 km deep
4.9
61 km NE of Hengchun, Taiwan
01:14 UTC · 20.3 km deep
Felt by 1
4.8
South Shetland Islands
11:34 UTC · 10.0 km deep
Earthquake Map — September 29, 2020
All Earthquakes — September 29, 2020
Showing 30 of 122 (filtered from 305)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-09-29 2020-09-29 23:37:44 UTC | 2.1ml | 24 km WNW of Cohoe, Alaska 60.427°, -151.734° | 70.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 24 km WNW of Cohoe, Alaska on September 29, 2020 at 23:37 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 23:15:47 UTC | 2.5ml | Rat Islands, Aleutian Islands, Alaska 51.632°, 178.310° | 126.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:15 UTC on September 29, 2020, a magnitude 2.5 tremor occurred near Rat Islands, Aleutian Islands, Alaska. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 22:59:34 UTC | 2.9md | 5 km SSW of La Parguera, Puerto Rico 17.929°, -67.066° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 5 km SSW of La Parguera, Puerto Rico on September 29, 2020 at 22:59 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.9 earthquake that occurred about 9 hours earlier. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 22:57:12 UTC | 3.4md | 4 km SSW of La Parguera, Puerto Rico 17.942°, -67.067° | 11.0 km | 5 | II | - | ✓ Reviewed | USGS → |
On September 29, 2020 at 22:57 UTC, a magnitude 3.4 earthquake struck 4 km SSW of La Parguera, Puerto Rico. Coming 9 hours after a magnitude 3.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 22:50:53 UTC | 2.1ml | 47 km ESE of Atka, Alaska 52.109°, -173.519° | 85.1 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2020 brought a magnitude 2.1 earthquake 47 km ESE of Atka, Alaska, logged at 22:50 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 22:16:19 UTC | 2.3ml | 253 km WSW of Yakutat, Alaska 58.498°, -143.636° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 253 km WSW of Yakutat, Alaska at 22:16 UTC on September 29, 2020. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 22:05:39 UTC | 4.4mb | 74 km ESE of Puerto Gaitán, Colombia 4.032°, -71.469° | 25.3 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2020 brought a magnitude 4.4 earthquake 74 km ESE of Puerto Gaitán, Colombia, logged at 22:05 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 21:55:32 UTC | 2.7md | 4 km SSE of Guánica, Puerto Rico 17.939°, -66.888° | 13.0 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2020 brought a magnitude 2.7 earthquake 4 km SSE of Guánica, Puerto Rico, logged at 21:55 UTC. It arrived roughly 8 hours after a larger magnitude 3.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 21:12:22 UTC | 4.1mb | 293 km E of Levuka, Fiji -17.783°, -177.927° | 505.5 km | - | - | - | ✓ Reviewed | USGS → |
At 21:12 UTC on September 29, 2020, a magnitude 4.1 tremor occurred 293 km E of Levuka, Fiji. 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. | ||||||||
2020-09-29 2020-09-29 20:58:29 UTC | 2.1ml | 27km NNE of Trona, CA 35.995°, -117.276° | 2.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 27km NNE of Trona, CA on September 29, 2020, with origin time 20:58 UTC. 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. | ||||||||
2020-09-29 2020-09-29 20:40:07 UTC | 4.7mb | Mariana Islands region 21.526°, 144.195° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 seismic event took place in the Mariana Islands region on September 29, 2020 at 20:40 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 20:27:34 UTC | 2.3md | 7 km SW of Guánica, Puerto Rico 17.927°, -66.955° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:27 UTC on September 29, 2020, a magnitude 2.3 tremor occurred 7 km SW of Guánica, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 3.9 earthquake that occurred about 7 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 20:26:30 UTC | 2.5ml | 66 km SE of Sand Point, Alaska 54.863°, -159.874° | 24.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 66 km SE of Sand Point, Alaska at 20:26 UTC on September 29, 2020. This event falls inside the aftershock decay of a nearby magnitude 3.4 earthquake that occurred about 17 hours earlier. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 20:17:55 UTC | 4.3mb | south of the Fiji Islands -23.449°, -179.808° | 519.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake south of the Fiji Islands with origin time 20:17 UTC on September 29, 2020. 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. | ||||||||
2020-09-29 2020-09-29 20:12:01 UTC | 2.2ml | 34 km ENE of Schurz, Nevada 39.033°, -118.428° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:12 UTC on September 29, 2020, a magnitude 2.2 tremor occurred 34 km ENE of Schurz, Nevada. 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. | ||||||||
2020-09-29 2020-09-29 19:01:52 UTC | 2.4ml | 21 km WNW of Stanley, Idaho 44.276°, -115.189° | 9.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 earthquake was recorded 21 km WNW of Stanley, Idaho on September 29, 2020 at 19:01 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 19:01:18 UTC | 5.1mww | 93 km NNW of Hihifo, Tonga -15.149°, -174.055° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2020 at 19:01 UTC, a magnitude 5.1 earthquake struck 93 km NNW of Hihifo, Tonga. It is the largest earthquake currently listed for worldwide seismic activity on September 29, 2020. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 18:52:15 UTC | 2.0ml | 13 km NW of Valdez, Alaska 61.226°, -146.514° | 5.4 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 13 km NW of Valdez, Alaska on September 29, 2020 at 18:52 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 18:49:16 UTC | 4.2mb | 58 km SW of Xunchang, China 28.149°, 104.231° | 36.5 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2020 brought a magnitude 4.2 earthquake 58 km SW of Xunchang, China, logged at 18:49 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 18:39:20 UTC | 4.5mb | Mariana Islands region 21.488°, 144.039° | 41.7 km | - | - | - | ✓ Reviewed | USGS → |
At 18:39 UTC on September 29, 2020, a magnitude 4.5 tremor occurred in the Mariana Islands region. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 18:06:33 UTC | 2.2ml | 60 km ESE of Pedro Bay, Alaska 59.543°, -153.154° | 105.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 60 km ESE of Pedro Bay, Alaska at 18:06 UTC on September 29, 2020. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 17:55:43 UTC | 4.9mb | 126 km SSW of Komodo, Indonesia -9.654°, 119.059° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2020, worldwide seismic activity registered a magnitude 4.9 earthquake 126 km SSW of Komodo, Indonesia at 17:55 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 17:38:02 UTC | 2.6ml | Unimak Island region, Alaska 53.885°, -163.675° | 33.6 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2020 brought a magnitude 2.6 earthquake in the Unimak Island region, Alaska, logged at 17:38 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 17:32:19 UTC | 2.8ml | 78 km SE of Perryville, AK 55.466°, -158.189° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
At 17:32 UTC on September 29, 2020, a magnitude 2.8 tremor occurred 78 km SE of Perryville, AK. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 17:25:42 UTC | 2.9md | 4 km SSW of La Parguera, Puerto Rico 17.942°, -67.069° | 11.0 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2020 brought a magnitude 2.9 earthquake 4 km SSW of La Parguera, Puerto Rico, logged at 17:25 UTC. Coming 4 hours after a magnitude 3.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 17:22:58 UTC | 2.4md | 0 km N of Indios, Puerto Rico 18.000°, -66.818° | 14.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2020, worldwide seismic activity registered a magnitude 2.4 earthquake 0 km N of Indios, Puerto Rico at 17:22 UTC. It arrived roughly 14 hours after a larger magnitude 2.9 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. | ||||||||
2020-09-29 2020-09-29 16:47:13 UTC | 2.6ml | 205 km SSE of Sand Point, Alaska 53.537°, -159.819° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2020 at 16:47 UTC, a magnitude 2.6 earthquake struck 205 km SSE of Sand Point, Alaska. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 16:17:19 UTC | 2.5ml | 60 km S of Shungnak, Alaska 66.347°, -157.291° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 60 km S of Shungnak, Alaska on September 29, 2020, with origin time 16:17 UTC. Coming 1 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-29 2020-09-29 16:06:51 UTC | 2.1md | 26km WNW of Petrolia, CA 40.377°, -124.579° | 24.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 26km WNW of Petrolia, CA came in on September 29, 2020 at 16:06 UTC. Coming 1 hours after a magnitude 2.5 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. | ||||||||
2020-09-29 2020-09-29 16:02:30 UTC | 3.3mw | 10km NE of Milpitas, CA 37.494°, -121.830° | 4.6 km | 1,024 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.3 earthquake 10km NE of Milpitas, CA with origin time 16:02 UTC on September 29, 2020. 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 M3.3 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 September 29, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.