Earthquakes on September 18, 2020
255
EARTHQUAKES on September 18, 2020
24-hour UTC period · USGS data
LARGEST: M6.9 — central Mid-Atlantic Ridge
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
22
M3.0–3.9
12
M2.0–2.9
55
M1.0–1.9
161
Activity Summary
255
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Significant Earthquakes (M4.5+)
6.9
central Mid-Atlantic Ridge
21:43 UTC · 10.0 km deep
5.9
12 km SSE of Arkalochóri, Greece
16:28 UTC · 44.0 km deep
Felt by 41
5.2
120 km N of Lae, Papua New Guinea
20:59 UTC · 134.5 km deep
Felt by 5
5.2
153 km WNW of Tobelo, Indonesia
18:43 UTC · 31.9 km deep
5.1
29 km SW of Murghob, Tajikistan
17:47 UTC · 36.3 km deep
4.9
South Shetland Islands
23:34 UTC · 10.0 km deep
4.8
South Shetland Islands
22:32 UTC · 10.0 km deep
4.7
70 km E of Qapqal, China
20:55 UTC · 10.0 km deep
Felt by 1
Earthquake Map — September 18, 2020
All Earthquakes — September 18, 2020
Showing 30 of 94 (filtered from 255)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-09-18 2020-09-18 23:34:24 UTC | 4.9mb | South Shetland Islands -62.293°, -58.266° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake near South Shetland Islands at 23:34 UTC on September 18, 2020. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 23:20:59 UTC | 3.4ml | 157 km W of Nikolski, Alaska 52.850°, -171.199° | 218.9 km | - | - | - | ✓ Reviewed | USGS → |
September 18, 2020 brought a magnitude 3.4 earthquake 157 km W of Nikolski, Alaska, logged at 23:20 UTC. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 23:05:24 UTC | 3.3ml | 33 km SE of Mina, Nevada 38.144°, -117.885° | 8.1 km | 1 | III | - | ✓ Reviewed | USGS → |
A magnitude 3.3 earthquake was recorded 33 km SE of Mina, Nevada on September 18, 2020 at 23:05 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 22:51:32 UTC | 2.0md | 7 km SW of Volcano, Hawaii 19.404°, -155.287° | 0.7 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.0 earthquake 7 km SW of Volcano, Hawaii at 22:51 UTC on September 18, 2020. 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. | ||||||||
2020-09-18 2020-09-18 22:43:44 UTC | 2.0ml | 112 km W of Adak, Alaska 51.760°, -178.254° | 89.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 112 km W of Adak, Alaska on September 18, 2020, with origin time 22:43 UTC. Coming 1 hours after a magnitude 2.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 22:39:27 UTC | 2.5ml | 29 km SSE of Mina, Nevada 38.148°, -117.957° | 11.3 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2020 at 22:39 UTC, a magnitude 2.5 earthquake struck 29 km SSE of Mina, Nevada. Coming 9 hours after a magnitude 3.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 22:32:23 UTC | 4.8mb | South Shetland Islands -62.342°, -58.581° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.8 event was detected near South Shetland Islands on September 18, 2020, with origin time 22:32 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 22:28:25 UTC | 2.8ml | 39 km ENE of Pedro Bay, Alaska 59.875°, -153.422° | 135.4 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2020, worldwide seismic activity registered a magnitude 2.8 earthquake 39 km ENE of Pedro Bay, Alaska at 22:28 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 22:12:33 UTC | 2.4ml | 19km W of Searles Valley, CA 35.786°, -117.609° | 5.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 19km W of Searles Valley, CA on September 18, 2020 at 22:12 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 22:07:06 UTC | 2.1ml | 126 km W of Adak, Alaska 51.849°, -178.466° | 126.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 126 km W of Adak, Alaska on September 18, 2020 at 22:07 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 21:50:32 UTC | 2.3ml | 10 km SSW of Manzanola, Colorado 38.026°, -103.921° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2020 at 21:50 UTC, a magnitude 2.3 earthquake struck 10 km SSW of Manzanola, Colorado. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 21:48:27 UTC | 3.5mwr | 50 km W of Mentone, Texas 31.706°, -104.133° | 5.0 km | 3 | IV | green | ✓ Reviewed | USGS → |
Reports of a magnitude 3.5 earthquake 50 km W of Mentone, Texas came in on September 18, 2020 at 21:48 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 21:43:59 UTC | 6.9mww | central Mid-Atlantic Ridge 0.930°, -26.853° | 10.0 km | - | III | green | ✓ Reviewed | USGS → |
On September 18, 2020 at 21:43 UTC, a magnitude 6.9 earthquake struck near central Mid-Atlantic Ridge. A tsunami evaluation was automatically initiated given the magnitude and location. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M6.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 21:03:58 UTC | 4.5mb | 63 km NE of Kuqa, China 42.113°, 83.476° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:03 UTC on September 18, 2020, a magnitude 4.5 tremor occurred 63 km NE of Kuqa, China. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 21:00:36 UTC | 2.7md | 0 km SW of Guánica, Puerto Rico 17.967°, -66.914° | 11.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:00 UTC on September 18, 2020, a magnitude 2.7 tremor occurred 0 km SW of Guánica, Puerto Rico. Coming 2 hours after a magnitude 2.9 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. | ||||||||
2020-09-18 2020-09-18 20:59:48 UTC | 5.2mww | 120 km N of Lae, Papua New Guinea -5.631°, 146.979° | 134.5 km | 5 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.2 earthquake 120 km N of Lae, Papua New Guinea with origin time 20:59 UTC on September 18, 2020. The event was offshore. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 20:55:48 UTC | 4.7mb | 70 km E of Qapqal, China 43.891°, 81.950° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.7 earthquake 70 km E of Qapqal, China came in on September 18, 2020 at 20:55 UTC. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 20:45:49 UTC | 3.1ml | 4 km W of Point MacKenzie, Alaska 61.364°, -150.063° | 40.4 km | 22 | II | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.1 earthquake 4 km W of Point MacKenzie, Alaska at 20:45 UTC on September 18, 2020. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 20:41:41 UTC | 4.4mb | 276 km W of Haveluloto, Tonga -21.596°, -177.836° | 349.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 seismic event took place 276 km W of Haveluloto, Tonga on September 18, 2020 at 20:41 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 20:08:21 UTC | 2.2ml | 46 km SE of Denali National Park, Alaska 63.203°, -151.163° | 143.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 46 km SE of Denali National Park, Alaska on September 18, 2020 at 20:08 UTC. Coming 13 hours after a magnitude 2.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 20:01:33 UTC | 2.1ml | 21 km WNW of Stanley, Idaho 44.279°, -115.200° | 12.2 km | - | - | - | ✓ Reviewed | USGS → |
September 18, 2020 brought a magnitude 2.1 earthquake 21 km WNW of Stanley, Idaho, logged at 20:01 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.1 earthquake that occurred about 13 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 19:54:29 UTC | 2.4ml | 33 km SE of Mina, Nevada 38.175°, -117.835° | 4.4 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2020, worldwide seismic activity registered a magnitude 2.4 earthquake 33 km SE of Mina, Nevada at 19:54 UTC. Coming 6 hours after a magnitude 3.3 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. | ||||||||
2020-09-18 2020-09-18 19:02:19 UTC | 2.0ml | 63 km SSE of Igiugig, Alaska 58.791°, -155.512° | 171.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 63 km SSE of Igiugig, Alaska came in on September 18, 2020 at 19:02 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 18:50:20 UTC | 2.2md | 2 km NE of P?hala, Hawaii 19.221°, -155.461° | 36.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 2 km NE of P?hala, Hawaii with origin time 18:50 UTC on September 18, 2020. It arrived roughly 12 hours after a larger magnitude 2.8 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. | ||||||||
2020-09-18 2020-09-18 18:43:28 UTC | 5.2mww | 153 km WNW of Tobelo, Indonesia 2.397°, 126.800° | 31.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2020, worldwide seismic activity registered a magnitude 5.2 earthquake 153 km WNW of Tobelo, Indonesia at 18:43 UTC. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 18:39:15 UTC | 2.9md | 6 km S of Indios, Puerto Rico 17.933°, -66.808° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2020 at 18:39 UTC, a magnitude 2.9 earthquake struck 6 km S of Indios, Puerto Rico. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 17:53:39 UTC | 4.4mb | 32 km SSE of Mawlaik, Myanmar 23.384°, 94.548° | 90.4 km | 2 | - | - | ✓ Reviewed | USGS → |
September 18, 2020 brought a magnitude 4.4 earthquake 32 km SSE of Mawlaik, Myanmar, logged at 17:53 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 17:47:49 UTC | 5.1mb | 29 km SW of Murghob, Tajikistan 38.011°, 73.692° | 36.3 km | - | - | - | ✓ Reviewed | USGS → |
At 17:47 UTC on September 18, 2020, a magnitude 5.1 tremor occurred 29 km SW of Murghob, Tajikistan. The event was offshore. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 17:41:49 UTC | 2.2ml | 11 km S of Anchor Point, Alaska 59.674°, -151.806° | 56.6 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2020, worldwide seismic activity registered a magnitude 2.2 earthquake 11 km S of Anchor Point, Alaska at 17:41 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-09-18 2020-09-18 17:32:01 UTC | 2.0ml | 151 km WSW of Adak, Alaska 51.202°, -178.526° | 22.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 151 km WSW of Adak, Alaska on September 18, 2020 at 17:32 UTC. See the M2.0 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, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.