Earthquakes on October 21, 2020
402
EARTHQUAKES on October 21, 2020
24-hour UTC period · USGS data
LARGEST: M5.9 — 189 km ESE of Neiafu, Tonga
10 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
7
M4.0–4.9
48
M3.0–3.9
67
M2.0–2.9
123
M1.0–1.9
157
Activity Summary
402
Total earthquakes
~250
Daily average
Elevated
Activity level
7
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.9
189 km ESE of Neiafu, Tonga
00:22 UTC · 10.0 km deep
5.7
46 km WSW of Taltal, Chile
09:13 UTC · 20.0 km deep
5.4
Pacific-Antarctic Ridge
04:21 UTC · 10.0 km deep
5.2
52 km SSW of Lithakiá, Greece
23:00 UTC · 9.8 km deep
Felt by 2
5.2
49 km WNW of Jiangyou, China
04:04 UTC · 10.0 km deep
05.2
South Shetland Islands
02:00 UTC · 12.4 km deep
5.1
130 km SSE of Sand Point, Alaska
01:17 UTC · 18.9 km deep
4.9
13 km N of Kandrian, Papua New Guinea
20:23 UTC · 63.0 km deep
Felt by 1
Earthquake Map — October 21, 2020
All Earthquakes — October 21, 2020
Showing 30 of 245 (filtered from 402)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-10-21 2020-10-21 23:50:21 UTC | 4.5mb | 36 km NW of Pelabuhanratu, Indonesia -6.744°, 106.332° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:50 UTC on October 21, 2020, a magnitude 4.5 tremor occurred 36 km NW of Pelabuhanratu, Indonesia. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 23:31:21 UTC | 4.2mb | 29 km WSW of Ovalle, Chile -30.720°, -71.479° | 39.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 29 km WSW of Ovalle, Chile on October 21, 2020, with origin time 23:31 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 23:26:43 UTC | 3.6mb | 137 km SSE of Sand Point, Alaska 54.218°, -159.589° | 24.7 km | - | - | - | ✓ Reviewed | USGS → |
At 23:26 UTC on October 21, 2020, a magnitude 3.6 tremor occurred 137 km SSE of Sand Point, Alaska. This event falls inside the aftershock decay of a nearby magnitude 5.1 earthquake that occurred about 22 hours earlier. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 23:22:22 UTC | 4.1mwr | 110 km SSE of Sand Point, Alaska 54.438°, -159.757° | 23.0 km | - | - | - | ✓ Reviewed | USGS → |
October 21, 2020 brought a magnitude 4.1 earthquake 110 km SSE of Sand Point, Alaska, logged at 23:22 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.1 earthquake that occurred about 22 hours earlier. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 23:21:02 UTC | 3.8mb | 128 km SSE of Sand Point, Alaska 54.295°, -159.636° | 21.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.8 earthquake 128 km SSE of Sand Point, Alaska at 23:21 UTC on October 21, 2020. This event falls inside the aftershock decay of a nearby magnitude 5.1 earthquake that occurred about 22 hours earlier. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 23:01:55 UTC | 4.6mb | South Sandwich Islands region -56.612°, -30.704° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
October 21, 2020 brought a magnitude 4.6 earthquake in the South Sandwich Islands region, logged at 23:01 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 23:00:54 UTC | 5.2mww | 52 km SSW of Lithakiá, Greece 37.319°, 20.513° | 9.8 km | 2 | - | - | ✓ Reviewed | USGS → |
On October 21, 2020, worldwide seismic activity registered a magnitude 5.2 earthquake 52 km SSW of Lithakiá, Greece at 23:00 UTC. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 23:00:14 UTC | 4.4mb | 59 km SW of Lithakiá, Greece 37.280°, 20.441° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 59 km SW of Lithakiá, Greece with origin time 23:00 UTC on October 21, 2020. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 22:41:43 UTC | 4.8mb | Mariana Islands region 18.841°, 147.209° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.8 earthquake in the Mariana Islands region with origin time 22:41 UTC on October 21, 2020. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 22:35:27 UTC | 3.2ml | 167 km SSE of Sand Point, Alaska 53.930°, -159.574° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.2 earthquake 167 km SSE of Sand Point, Alaska at 22:35 UTC on October 21, 2020. This event falls inside the aftershock decay of a nearby magnitude 3.7 earthquake that occurred about 13 hours earlier. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 22:21:54 UTC | 2.0ml | 25 km NW of Stanley, Idaho 44.363°, -115.182° | 4.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 25 km NW of Stanley, Idaho came in on October 21, 2020 at 22:21 UTC. It arrived roughly 1 hours after a larger magnitude 2.9 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 22:02:53 UTC | 3.6mb | 119 km SSE of Sand Point, Alaska 54.395°, -159.616° | 25.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.6 earthquake 119 km SSE of Sand Point, Alaska at 22:02 UTC on October 21, 2020. Coming 21 hours after a magnitude 5.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 21:59:01 UTC | 2.2md | 10 km S of Kapaau, Hawaii 20.140°, -155.805° | 22.5 km | 10 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 10 km S of Kapaau, Hawaii came in on October 21, 2020 at 21:59 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 21:55:51 UTC | 2.4md | 1 km NNW of Guayanilla, Puerto Rico 18.033°, -66.799° | 17.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 1 km NNW of Guayanilla, Puerto Rico with origin time 21:55 UTC on October 21, 2020. It arrived roughly 8 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 21:54:32 UTC | 2.2ml | 40 km WSW of Tatitlek, Alaska 60.738°, -147.371° | 12.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 40 km WSW of Tatitlek, Alaska on October 21, 2020 at 21:54 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 21:49:45 UTC | 2.1md | 2 km NNE of Cooter, Missouri 36.071°, -89.802° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 2 km NNE of Cooter, Missouri on October 21, 2020, with origin time 21:49 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 21:45:12 UTC | 2.1ml | 26 km NW of Stanley, Idaho 44.364°, -115.195° | 4.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 26 km NW of Stanley, Idaho at 21:45 UTC on October 21, 2020. It arrived roughly 1 hours after a larger magnitude 2.9 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. | ||||||||
2020-10-21 2020-10-21 21:38:08 UTC | 2.0ml | 16 km N of Beluga, Alaska 61.283°, -151.128° | 64.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 16 km N of Beluga, Alaska on October 21, 2020 at 21:38 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 21:11:17 UTC | 2.4ml | 5 km SSW of Princeton, Canada 49.407°, -120.531° | -0.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 5 km SSW of Princeton, Canada on October 21, 2020 at 21:11 UTC. 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. | ||||||||
2020-10-21 2020-10-21 20:59:19 UTC | 2.9ml | 23 km WNW of Stanley, Idaho 44.305°, -115.209° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 23 km WNW of Stanley, Idaho with origin time 20:59 UTC on October 21, 2020. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 20:56:37 UTC | 4.6mb | south of the Kermadec Islands -34.536°, 179.382° | 138.5 km | - | - | - | ✓ Reviewed | USGS → |
On October 21, 2020 at 20:56 UTC, a magnitude 4.6 earthquake struck south of the Kermadec Islands. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 20:55:28 UTC | 4.2mb | 84 km W of Port-Olry, Vanuatu -14.984°, 166.285° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.2 earthquake 84 km W of Port-Olry, Vanuatu came in on October 21, 2020 at 20:55 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 20:53:50 UTC | 4.1mb | 235 km E of Levuka, Fiji -17.820°, -178.477° | 555.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 21, 2020 at 20:53 UTC, a magnitude 4.1 earthquake struck 235 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. | ||||||||
2020-10-21 2020-10-21 20:51:18 UTC | 4.5mb | 48 km WSW of Champerico, Guatemala 14.080°, -92.309° | 41.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake 48 km WSW of Champerico, Guatemala at 20:51 UTC on October 21, 2020. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 20:23:21 UTC | 4.9mb | 13 km N of Kandrian, Papua New Guinea -6.084°, 149.555° | 63.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.9 earthquake 13 km N of Kandrian, Papua New Guinea came in on October 21, 2020 at 20:23 UTC. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 20:17:30 UTC | 4.6mb | 65 km S of Hihifo, Tonga -16.540°, -173.734° | 69.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 earthquake was recorded 65 km S of Hihifo, Tonga on October 21, 2020 at 20:17 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 20:09:24 UTC | 2.3ml | 5 km SSW of Tumalo, Oregon 44.106°, -121.359° | -1.4 km | - | - | - | ✓ Reviewed | USGS → |
On October 21, 2020, worldwide seismic activity registered a magnitude 2.3 earthquake 5 km SSW of Tumalo, Oregon at 20:09 UTC. 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. | ||||||||
2020-10-21 2020-10-21 19:55:25 UTC | 2.3ml | 116 km SSW of Kaktovik, Alaska 69.141°, -144.588° | 9.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded 116 km SSW of Kaktovik, Alaska on October 21, 2020 at 19:55 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 19:52:14 UTC | 4.5mb | 101 km S of Sarangani, Philippines 4.494°, 125.555° | 71.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 101 km S of Sarangani, Philippines on October 21, 2020, with origin time 19:52 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-21 2020-10-21 19:49:01 UTC | 4.3mb | 163 km SSW of Tomohon, Indonesia -0.123°, 124.466° | 55.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 163 km SSW of Tomohon, Indonesia on October 21, 2020 at 19:49 UTC. See the M4.3 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 October 21, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.