Earthquakes on September 18, 2021
217
EARTHQUAKES on September 18, 2021
24-hour UTC period · USGS data
20 km deep · 24 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
37
M3.0–3.9
4
M2.0–2.9
59
M1.0–1.9
114
Activity Summary
217
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.3
117 km SSE of Popondetta, Papua New Guinea
20:47 UTC · 20.3 km deep
Felt by 24
5.1
21 km NNE of Hihifo, Tonga
00:56 UTC · 66.7 km deep
Felt by 3
5.0
27 km SW of La Libertad, El Salvador
14:43 UTC · 61.6 km deep
Felt by 13
4.9
86 km SSE of Panguna, Papua New Guinea
22:06 UTC · 48.9 km deep
4.9
South Sandwich Islands region
13:12 UTC · 10.0 km deep
4.9
226 km SW of Labuan, Indonesia
03:44 UTC · 10.0 km deep
Felt by 2
4.8
69 km S of Kabalo, Democratic Republic of the Congo
12:56 UTC · 10.0 km deep
Felt by 2
4.7
East Timor region
18:29 UTC · 10.0 km deep
Felt by 1
Earthquake Map — September 18, 2021
All Earthquakes — September 18, 2021
Showing 30 of 103 (filtered from 217)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-09-18 2021-09-18 23:38:49 UTC | 4.6mb | 46 km SSE of Pelabuhanratu, Indonesia -7.398°, 106.638° | 68.8 km | 2 | - | - | ✓ Reviewed | USGS → |
On September 18, 2021 at 23:38 UTC, a magnitude 4.6 earthquake struck 46 km SSE of Pelabuhanratu, Indonesia. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 23:07:51 UTC | 4.4mb | 6 km WSW of Funaishikawa, Japan 36.450°, 140.493° | 72.3 km | 13 | - | - | ✓ Reviewed | USGS → |
On September 18, 2021 at 23:07 UTC, a magnitude 4.4 earthquake struck 6 km WSW of Funaishikawa, Japan. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 22:42:21 UTC | 2.1md | 1 km N of Dyersburg, Tennessee 36.047°, -89.388° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 1 km N of Dyersburg, Tennessee with origin time 22:42 UTC on September 18, 2021. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 22:37:01 UTC | 2.1md | 5 km SSW of P?hala, Hawaii 19.154°, -155.491° | 33.9 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.1 earthquake 5 km SSW of P?hala, Hawaii at 22:37 UTC on September 18, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 8 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 22:27:01 UTC | 4.1ml | 36 km NNW of Toyah, Texas 31.597°, -104.001° | 7.3 km | 3 | IV | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake 36 km NNW of Toyah, Texas came in on September 18, 2021 at 22:27 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 22:22:44 UTC | 4.3mb | 262 km W of Abepura, Indonesia -2.203°, 138.304° | 35.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 262 km W of Abepura, Indonesia at 22:22 UTC on September 18, 2021. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 22:06:08 UTC | 4.9mb | 86 km SSE of Panguna, Papua New Guinea -7.071°, 155.699° | 48.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2021, worldwide seismic activity registered a magnitude 4.9 earthquake 86 km SSE of Panguna, Papua New Guinea at 22:06 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 21:50:04 UTC | 4.3mb | 48 km NNW of Maumere, Indonesia -8.220°, 122.026° | 206.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 48 km NNW of Maumere, Indonesia on September 18, 2021, with origin time 21:50 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 21:49:32 UTC | 2.0ml | 49 km ESE of Nenana, Alaska 64.376°, -148.153° | 14.9 km | - | - | - | Auto | USGS → |
September 18, 2021 brought a magnitude 2.0 earthquake 49 km ESE of Nenana, Alaska, logged at 21:49 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 21:23:56 UTC | 4.6mb | 151 km SW of Labuan, Indonesia -7.448°, 104.967° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 earthquake was recorded 151 km SW of Labuan, Indonesia on September 18, 2021 at 21:23 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 20:47:07 UTC | 5.3mww | 117 km SSE of Popondetta, Papua New Guinea -9.761°, 148.597° | 20.3 km | 24 | VI | green | ✓ Reviewed | USGS → |
On September 18, 2021 at 20:47 UTC, a magnitude 5.3 earthquake struck 117 km SSE of Popondetta, Papua New Guinea. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on September 18, 2021. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 20:45:41 UTC | 4.3mb | South Sandwich Islands region -57.482°, -24.441° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake in the South Sandwich Islands region came in on September 18, 2021 at 20:45 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 20:42:37 UTC | 4.6mb | 120 km SE of Katsuura, Japan 34.272°, 141.101° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.6 earthquake 120 km SE of Katsuura, Japan with origin time 20:42 UTC on September 18, 2021. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 20:29:58 UTC | 2.0md | 2 km SE of P?hala, Hawaii 19.187°, -155.465° | 35.5 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.0 earthquake 2 km SE of P?hala, Hawaii came in on September 18, 2021 at 20:29 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 6 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 20:24:21 UTC | 4.2mb | 112 km ESE of Biak, Indonesia -1.625°, 136.988° | 32.3 km | - | - | - | ✓ Reviewed | USGS → |
At 20:24 UTC on September 18, 2021, a magnitude 4.2 tremor occurred 112 km ESE of Biak, Indonesia. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 20:18:52 UTC | 2.3ml | 50 km NNW of Yakutat, Alaska 59.941°, -140.155° | 0.0 km | - | - | - | Auto | USGS → |
At 20:18 UTC on September 18, 2021, a magnitude 2.3 tremor occurred 50 km NNW of Yakutat, Alaska. This event falls inside the aftershock decay of a nearby magnitude 2.5 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 20:04:39 UTC | 2.1md | 7 km ESE of P?hala, Hawaii 19.184°, -155.413° | 31.6 km | - | - | - | Auto | USGS → |
At 20:04 UTC on September 18, 2021, a magnitude 2.1 tremor occurred 7 km ESE of P?hala, Hawaii. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 5 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 20:04:15 UTC | 2.1ml | 4 km E of P?hala, Hawaii 19.200°, -155.436° | 32.0 km | - | - | - | Auto | USGS → |
On September 18, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 4 km E of P?hala, Hawaii at 20:04 UTC. It arrived roughly 5 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 19:46:40 UTC | 4.6mb | South Sandwich Islands region -59.665°, -26.072° | 39.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2021, worldwide seismic activity registered a magnitude 4.6 earthquake in the South Sandwich Islands region at 19:46 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 19:34:09 UTC | 2.5md | 13km SSE of Bodie, CA 38.109°, -118.950° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake 13km SSE of Bodie, CA with origin time 19:34 UTC on September 18, 2021. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 19:32:57 UTC | 2.0ml | 9 km NNW of Cordova, Alaska 60.622°, -145.826° | 20.4 km | - | - | - | Auto | USGS → |
On September 18, 2021 at 19:32 UTC, a magnitude 2.0 earthquake struck 9 km NNW of Cordova, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 19:20:31 UTC | 4.0mw | 30km SSW of Smith Valley, NV 38.547°, -119.499° | 6.8 km | 105 | IV | - | ✓ Reviewed | USGS → |
On September 18, 2021 at 19:20 UTC, a magnitude 4.0 earthquake struck 30km SSW of Smith Valley, NV. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 18:45:09 UTC | 2.3md | 4 km S of Guánica, Puerto Rico 17.928°, -66.917° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2021, worldwide seismic activity registered a magnitude 2.3 earthquake 4 km S of Guánica, Puerto Rico at 18:45 UTC. It arrived roughly 11 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 18:39:03 UTC | 4.4mb | 141 km W of Hihifo, Tonga -16.189°, -175.094° | 222.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 141 km W of Hihifo, Tonga on September 18, 2021 at 18:39 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 18:29:00 UTC | 4.7mb | East Timor region -8.404°, 127.883° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.7 earthquake in the East Timor region came in on September 18, 2021 at 18:29 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 18:25:19 UTC | 2.0md | 3 km SSE of P?hala, Hawaii 19.175°, -155.466° | 34.3 km | - | - | - | Auto | USGS → |
A magnitude 2.0 seismic event took place 3 km SSE of P?hala, Hawaii on September 18, 2021 at 18:25 UTC. Coming 4 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. | ||||||||
2021-09-18 2021-09-18 18:05:38 UTC | 2.1md | 2 km S of P?hala, Hawaii 19.177°, -155.475° | 39.0 km | - | - | - | Auto | USGS → |
September 18, 2021 brought a magnitude 2.1 earthquake 2 km S of P?hala, Hawaii, logged at 18:05 UTC. Coming 3 hours after a magnitude 2.4 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. | ||||||||
2021-09-18 2021-09-18 17:54:56 UTC | 2.2md | 6 km SSW of P?hala, Hawaii 19.152°, -155.509° | 35.2 km | - | - | - | Auto | USGS → |
At 17:54 UTC on September 18, 2021, a magnitude 2.2 tremor occurred 6 km SSW of P?hala, Hawaii. Coming 3 hours after a magnitude 2.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-09-18 2021-09-18 17:51:35 UTC | 2.3ml | 55 km S of Whites City, New Mexico 31.672°, -104.387° | 7.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 55 km S of Whites City, New Mexico at 17:51 UTC on September 18, 2021. Coming 9 hours after a magnitude 2.7 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. | ||||||||
2021-09-18 2021-09-18 17:36:06 UTC | 2.4ml | southern Idaho 44.359°, -114.848° | 7.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 earthquake was recorded near southern Idaho on September 18, 2021 at 17:36 UTC. 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 18, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.