Earthquakes on October 20, 2020
500
EARTHQUAKES on October 20, 2020
24-hour UTC period · USGS data
LARGEST: M5.6 — 11 km SW of Álftanes, Iceland
10 km deep · 91 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
71
M3.0–3.9
134
M2.0–2.9
115
M1.0–1.9
175
Activity Summary
500
Total earthquakes
~250
Daily average
Elevated
Activity level
5
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.6
11 km SW of Álftanes, Iceland
13:43 UTC · 10.0 km deep
Felt by 91
5.6
130 km SSE of Sand Point, Alaska
04:07 UTC · 12.8 km deep
5.2
Alamagan region, Northern Mariana Islands
13:20 UTC · 99.6 km deep
Felt by 1
5.1
118 km SSE of Sand Point, Alaska
12:32 UTC · 22.0 km deep
5.0
62 km NE of Pangai, Tonga
18:57 UTC · 10.0 km deep
4.9
94 km SSE of Sand Point, Alaska
21:38 UTC · 28.4 km deep
4.9
central Mid-Atlantic Ridge
14:01 UTC · 10.0 km deep
4.9
104 km SSE of Sand Point, Alaska
08:18 UTC · 27.8 km deep
Earthquake Map — October 20, 2020
All Earthquakes — October 20, 2020
Showing 30 of 325 (filtered from 500)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-10-20 2020-10-20 23:57:57 UTC | 4.0mb | 94 km SSE of Sand Point, Alaska 54.627°, -159.703° | 29.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.0 event was detected 94 km SSE of Sand Point, Alaska on October 20, 2020, with origin time 23:57 UTC. It arrived roughly 2 hours after a larger magnitude 4.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 23:51:23 UTC | 2.0ml | 71 km NW of Elfin Cove, Alaska 58.621°, -137.260° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 71 km NW of Elfin Cove, Alaska on October 20, 2020 at 23:51 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 23:48:55 UTC | 4.1mb | 126 km ESE of Arica, Chile -18.939°, -69.202° | 135.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place 126 km ESE of Arica, Chile on October 20, 2020 at 23:48 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 23:15:45 UTC | 2.1ml | 41 km SSW of Glacier View, Alaska 61.442°, -147.839° | 20.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 20, 2020, worldwide seismic activity registered a magnitude 2.1 earthquake 41 km SSW of Glacier View, Alaska at 23:15 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 23:08:05 UTC | 4.6mb | 27 km N of Jalal-Abad, Kyrgyzstan 41.179°, 73.040° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
At 23:08 UTC on October 20, 2020, a magnitude 4.6 tremor occurred 27 km N of Jalal-Abad, Kyrgyzstan. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 23:02:09 UTC | 2.8ml | 99 km SSE of Sand Point, Alaska 54.548°, -159.768° | 23.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 99 km SSE of Sand Point, Alaska on October 20, 2020, with origin time 23:02 UTC. Coming 1 hours after a magnitude 4.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 22:58:48 UTC | 4.3mb | 38 km ESE of Farkh?r, Afghanistan 36.469°, 70.265° | 214.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 38 km ESE of Farkh?r, Afghanistan at 22:58 UTC on October 20, 2020. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 22:46:04 UTC | 3.9mb | 136 km SSE of Sand Point, Alaska 54.237°, -159.558° | 23.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.9 event was detected 136 km SSE of Sand Point, Alaska on October 20, 2020, with origin time 22:46 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.6 earthquake that occurred about 19 hours earlier. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 22:42:37 UTC | 4.2mb | 92 km SSE of Sand Point, Alaska 54.602°, -159.814° | 29.8 km | - | - | - | ✓ Reviewed | USGS → |
At 22:42 UTC on October 20, 2020, a magnitude 4.2 tremor occurred 92 km SSE of Sand Point, Alaska. Coming 1 hours after a magnitude 4.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 22:30:30 UTC | 4.2mb | 124 km E of Murghob, Tajikistan 38.320°, 75.375° | 117.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.2 earthquake 124 km E of Murghob, Tajikistan at 22:30 UTC on October 20, 2020. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 22:18:46 UTC | 2.3ml | 66 km WNW of Nikolski, Alaska 53.162°, -169.785° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:18 UTC on October 20, 2020, a magnitude 2.3 tremor occurred 66 km WNW of Nikolski, Alaska. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 22:16:24 UTC | 2.3md | 1 km SSE of P?hala, Hawaii 19.187°, -155.471° | 32.5 km | - | - | - | ✓ Reviewed | USGS → |
October 20, 2020 brought a magnitude 2.3 earthquake 1 km SSE of P?hala, Hawaii, logged at 22:16 UTC. Coming 1 hours after a magnitude 2.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 22:06:56 UTC | 2.9ml | 102 km SSE of Sand Point, Alaska 54.570°, -159.600° | 25.4 km | - | - | - | ✓ Reviewed | USGS → |
On October 20, 2020 at 22:06 UTC, a magnitude 2.9 earthquake struck 102 km SSE of Sand Point, Alaska. It arrived roughly 1 hours after a larger magnitude 4.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:56:26 UTC | 2.9ml | 98 km SSE of Sand Point, Alaska 54.566°, -159.736° | 21.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 98 km SSE of Sand Point, Alaska on October 20, 2020 at 21:56 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.9 earthquake that occurred about 1 hours earlier. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:45:23 UTC | 2.8ml | 78 km SW of Adak, Alaska 51.420°, -177.509° | 28.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 78 km SW of Adak, Alaska came in on October 20, 2020 at 21:45 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:38:51 UTC | 4.9mb | 94 km SSE of Sand Point, Alaska 54.586°, -159.799° | 28.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake 94 km SSE of Sand Point, Alaska at 21:38 UTC on October 20, 2020. In the 72 hours after this event, the USGS recorded 5 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:37:19 UTC | 4.5mb | 28 km SSE of Iztapa, Guatemala 13.689°, -90.620° | 41.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 20, 2020 at 21:37 UTC, a magnitude 4.5 earthquake struck 28 km SSE of Iztapa, Guatemala. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:36:58 UTC | 2.5ml | 16 km NE of Kalama, Washington 46.113°, -122.691° | 13.7 km | 5 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 16 km NE of Kalama, Washington came in on October 20, 2020 at 21:36 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:25:48 UTC | 3.0ml | 104 km SSE of Sand Point, Alaska 54.500°, -159.751° | 21.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 104 km SSE of Sand Point, Alaska came in on October 20, 2020 at 21:25 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.1 earthquake that occurred about 9 hours earlier. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:16:33 UTC | 2.4ml | 4 km SE of P?hala, Hawaii 19.182°, -155.447° | 42.4 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.4 earthquake 4 km SE of P?hala, Hawaii came in on October 20, 2020 at 21:16 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:15:26 UTC | 2.3md | 10 km SSE of P?hala, Hawaii 19.117°, -155.441° | 40.7 km | - | - | - | Auto | USGS → |
On October 20, 2020 at 21:15 UTC, a magnitude 2.3 earthquake struck 10 km SSE of P?hala, Hawaii. It arrived roughly 1 hours after a larger magnitude 2.3 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:12:24 UTC | 2.0md | 13 km SSE of P?hala, Hawaii 19.090°, -155.434° | 45.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 13 km SSE of P?hala, Hawaii on October 20, 2020, with origin time 21:12 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.3 earthquake that occurred about 1 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 21:03:15 UTC | 2.3ml | 9 km S of P?hala, Hawaii 19.121°, -155.486° | 44.8 km | - | - | - | Auto | USGS → |
A magnitude 2.3 earthquake was recorded 9 km S of P?hala, Hawaii on October 20, 2020 at 21:03 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 20:25:02 UTC | 2.5ml | 140 km WNW of Haines Junction, Canada 61.293°, -139.859° | 4.6 km | - | - | - | ✓ Reviewed | USGS → |
On October 20, 2020 at 20:25 UTC, a magnitude 2.5 earthquake struck 140 km WNW of Haines Junction, Canada. 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. | ||||||||
2020-10-20 2020-10-20 20:24:39 UTC | 2.4ml | 140 km WNW of Haines Junction, Canada 61.300°, -139.860° | 7.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 140 km WNW of Haines Junction, Canada on October 20, 2020 at 20:24 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 20:23:41 UTC | 4.2mb | 129 km SSE of Sand Point, Alaska 54.289°, -159.616° | 20.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 129 km SSE of Sand Point, Alaska on October 20, 2020, with origin time 20:23 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.6 earthquake that occurred about 16 hours earlier. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 20:16:32 UTC | 4.0mb | 129 km SSE of Sand Point, Alaska 54.334°, -159.480° | 25.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.0 earthquake 129 km SSE of Sand Point, Alaska came in on October 20, 2020 at 20:16 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.6 earthquake that occurred about 16 hours earlier. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-20 2020-10-20 20:14:19 UTC | 2.9ml | south of Alaska 54.444°, -159.637° | 27.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake south of Alaska with origin time 20:14 UTC on October 20, 2020. Coming 16 hours after a magnitude 5.6 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. | ||||||||
2020-10-20 2020-10-20 20:00:25 UTC | 3.7mb | 110 km SSE of Sand Point, Alaska 54.489°, -159.614° | 33.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.7 seismic event took place 110 km SSE of Sand Point, Alaska on October 20, 2020 at 20:00 UTC. Coming 7 hours after a magnitude 5.1 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. | ||||||||
2020-10-20 2020-10-20 19:55:49 UTC | 4.0mb | 47 km E of Margherita, India 27.226°, 96.144° | 58.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 seismic event took place 47 km E of Margherita, India on October 20, 2020 at 19:55 UTC. The event was offshore. See the M4.0 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 October 20, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.