Earthquakes on September 30, 2020
334
EARTHQUAKES on September 30, 2020
24-hour UTC period · USGS data
10 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
29
M3.0–3.9
11
M2.0–2.9
99
M1.0–1.9
192
Activity Summary
334
Total earthquakes
~250
Daily average
Elevated
Activity level
3
M5.0+ events
Significant Earthquakes (M4.5+)
5.3
98 km NW of Port-Vila, Vanuatu
19:35 UTC · 10.0 km deep
5.1
55 km ENE of La Paz, Philippines
22:10 UTC · 10.0 km deep
5.0
34 km SE of Jiufen, Taiwan
04:37 UTC · 106.0 km deep
Felt by 16
4.8
South Shetland Islands
16:58 UTC · 10.0 km deep
4.8
48 km SE of Ōfunato, Japan
13:58 UTC · 43.0 km deep
4.7
South Shetland Islands
14:35 UTC · 5.0 km deep
4.7
Carlsberg Ridge
05:42 UTC · 10.0 km deep
4.7
92 km SE of Basco, Philippines
00:49 UTC · 10.0 km deep
Earthquake Map — September 30, 2020
All Earthquakes — September 30, 2020
Showing 30 of 142 (filtered from 334)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-09-30 2020-09-30 23:59:54 UTC | 2.2ml | 4km ENE of Westmorland, CA 33.054°, -115.589° | 2.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 4km ENE of Westmorland, CA on September 30, 2020 at 23:59 UTC. It arrived roughly 1 hours after a larger magnitude 4.3 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. | ||||||||
2020-09-30 2020-09-30 23:58:02 UTC | 3.7mw | 4km ENE of Westmorland, CA 33.049°, -115.585° | 9.5 km | 5 | IV | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.7 earthquake 4km ENE of Westmorland, CA with origin time 23:58 UTC on September 30, 2020. Coming 1 hours after a magnitude 4.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:57:07 UTC | 2.7ml | 3km ENE of Westmorland, CA 33.050°, -115.590° | 5.3 km | - | - | - | ✓ Reviewed | USGS → |
On September 30, 2020 at 23:57 UTC, a magnitude 2.7 earthquake struck 3km ENE of Westmorland, CA. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:53:50 UTC | 2.4ml | 4km NE of Westmorland, CA 33.056°, -115.590° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 4km NE of Westmorland, CA on September 30, 2020 at 23:53 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. 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. | ||||||||
2020-09-30 2020-09-30 23:50:25 UTC | 2.1ml | 3km NE of Westmorland, CA 33.054°, -115.593° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 3km NE of Westmorland, CA at 23:50 UTC on September 30, 2020. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:46:50 UTC | 2.5ml | 3km ENE of Westmorland, CA 33.047°, -115.589° | 3.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 3km ENE of Westmorland, CA on September 30, 2020 at 23:46 UTC. It arrived roughly 1 hours after a larger magnitude 4.3 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 M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:45:03 UTC | 2.9ml | 3km ENE of Westmorland, CA 33.046°, -115.593° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.9 earthquake 3km ENE of Westmorland, CA at 23:45 UTC on September 30, 2020. It arrived roughly 1 hours after a larger magnitude 4.3 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 M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:43:34 UTC | 2.2ml | 4km ENE of Westmorland, CA 33.045°, -115.579° | 3.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 4km ENE of Westmorland, CA on September 30, 2020, with origin time 23:43 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. 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. | ||||||||
2020-09-30 2020-09-30 23:43:28 UTC | 2.1ml | 4km ENE of Westmorland, CA 33.054°, -115.587° | 7.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 4km ENE of Westmorland, CA with origin time 23:43 UTC on September 30, 2020. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:43:19 UTC | 2.3ml | 4km ESE of Westmorland, CA 33.030°, -115.585° | 3.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 30, 2020 at 23:43 UTC, a magnitude 2.3 earthquake struck 4km ESE of Westmorland, CA. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. 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. | ||||||||
2020-09-30 2020-09-30 23:42:35 UTC | 2.3ml | 3km ENE of Westmorland, CA 33.045°, -115.591° | 1.8 km | - | - | - | ✓ Reviewed | USGS → |
September 30, 2020 brought a magnitude 2.3 earthquake 3km ENE of Westmorland, CA, logged at 23:42 UTC. It arrived roughly 1 hours after a larger magnitude 4.3 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. | ||||||||
2020-09-30 2020-09-30 23:42:32 UTC | 2.2ml | 3km E of Westmorland, CA 33.039°, -115.594° | 2.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 30, 2020, worldwide seismic activity registered a magnitude 2.2 earthquake 3km E of Westmorland, CA at 23:42 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. 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. | ||||||||
2020-09-30 2020-09-30 23:40:30 UTC | 2.2ml | 4km ENE of Westmorland, CA 33.047°, -115.584° | 4.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 4km ENE of Westmorland, CA came in on September 30, 2020 at 23:40 UTC. Coming 1 hours after a magnitude 4.3 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 M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:40:22 UTC | 2.1ml | 3km ESE of Westmorland, CA 33.026°, -115.588° | 2.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 3km ESE of Westmorland, CA on September 30, 2020, with origin time 23:40 UTC. It arrived roughly 1 hours after a larger magnitude 4.3 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:39:39 UTC | 2.8ml | 5km E of Westmorland, CA 33.039°, -115.570° | 5.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 5km E of Westmorland, CA came in on September 30, 2020 at 23:39 UTC. It arrived roughly 1 hours after a larger magnitude 4.3 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:39:29 UTC | 2.4ml | 4km ENE of Westmorland, CA 33.056°, -115.584° | 3.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 4km ENE of Westmorland, CA with origin time 23:39 UTC on September 30, 2020. Coming 1 hours after a magnitude 4.3 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. | ||||||||
2020-09-30 2020-09-30 23:39:07 UTC | 2.1ml | 3km ENE of Westmorland, CA 33.043°, -115.590° | 2.1 km | - | - | - | ✓ Reviewed | USGS → |
On September 30, 2020 at 23:39 UTC, a magnitude 2.1 earthquake struck 3km ENE of Westmorland, CA. Coming 1 hours after a magnitude 4.3 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:38:06 UTC | 3.2ml | 3km E of Westmorland, CA 33.042°, -115.585° | 5.3 km | 3 | - | - | ✓ Reviewed | USGS → |
This magnitude 3.2 event was detected 3km E of Westmorland, CA on September 30, 2020, with origin time 23:38 UTC. It arrived roughly 1 hours after a larger magnitude 4.3 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. | ||||||||
2020-09-30 2020-09-30 23:35:19 UTC | 2.6ml | 4km E of Westmorland, CA 33.041°, -115.583° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 4km E of Westmorland, CA came in on September 30, 2020 at 23:35 UTC. Coming 1 hours after a magnitude 4.3 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 M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:34:45 UTC | 2.9ml | 4km ENE of Westmorland, CA 33.047°, -115.581° | 3.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.9 event was detected 4km ENE of Westmorland, CA on September 30, 2020, with origin time 23:34 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:34:26 UTC | 3.1ml | 3km NE of Westmorland, CA 33.054°, -115.593° | 2.8 km | 1 | - | - | ✓ Reviewed | USGS → |
September 30, 2020 brought a magnitude 3.1 earthquake 3km NE of Westmorland, CA, logged at 23:34 UTC. It arrived roughly 1 hours after a larger magnitude 4.3 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 M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:34:18 UTC | 3.0ml | 3km NE of Westmorland, CA 33.058°, -115.597° | 2.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 30, 2020, worldwide seismic activity registered a magnitude 3.0 earthquake 3km NE of Westmorland, CA at 23:34 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:34:08 UTC | 2.9ml | 3km ENE of Westmorland, CA 33.044°, -115.587° | 3.8 km | - | - | - | ✓ Reviewed | USGS → |
September 30, 2020 brought a magnitude 2.9 earthquake 3km ENE of Westmorland, CA, logged at 23:34 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:33:34 UTC | 3.2ml | 3km ENE of Westmorland, CA 33.051°, -115.591° | 3.3 km | 2 | IV | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.2 earthquake 3km ENE of Westmorland, CA at 23:33 UTC on September 30, 2020. Coming 1 hours after a magnitude 4.3 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 M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:31:51 UTC | 4.3mw | 3km NE of Westmorland, CA 33.053°, -115.596° | 4.8 km | 74 | VI | green | ✓ Reviewed | USGS → |
On September 30, 2020, worldwide seismic activity registered a magnitude 4.3 earthquake 3km NE of Westmorland, CA at 23:31 UTC. In the 72 hours after this event, the USGS recorded 38 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:31:11 UTC | 2.9ml | 3km ENE of Westmorland, CA 33.043°, -115.587° | 3.2 km | - | - | - | ✓ Reviewed | USGS → |
On September 30, 2020 at 23:31 UTC, a magnitude 2.9 earthquake struck 3km ENE of Westmorland, CA. Coming 1 hours after a magnitude 3.6 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 M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:30:43 UTC | 2.8ml | 3km E of Westmorland, CA 33.039°, -115.591° | 3.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 3km E of Westmorland, CA at 23:30 UTC on September 30, 2020. This event falls inside the aftershock decay of a nearby magnitude 3.6 earthquake that occurred about 1 hours earlier. 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. | ||||||||
2020-09-30 2020-09-30 23:29:00 UTC | 2.1ml | 3km ENE of Westmorland, CA 33.052°, -115.592° | 3.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 30, 2020, worldwide seismic activity registered a magnitude 2.1 earthquake 3km ENE of Westmorland, CA at 23:29 UTC. Coming 1 hours after a magnitude 3.6 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:24:52 UTC | 2.3ml | 6km ESE of Westmorland, CA 33.021°, -115.566° | 4.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 6km ESE of Westmorland, CA at 23:24 UTC on September 30, 2020. Coming 1 hours after a magnitude 3.6 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-30 2020-09-30 23:24:41 UTC | 2.5ml | 3km E of Westmorland, CA 33.038°, -115.585° | 3.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 3km E of Westmorland, CA on September 30, 2020 at 23:24 UTC. It arrived roughly 1 hours after a larger magnitude 3.6 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 M2.5 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 30, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.