Earthquakes on March 18, 2021
333
EARTHQUAKES on March 18, 2021
24-hour UTC period · USGS data
LARGEST: M6.0 — 21 km NNE of Bejaïa, Algeria
8 km deep · 146 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
8
M4.0–4.9
51
M3.0–3.9
11
M2.0–2.9
64
M1.0–1.9
199
Activity Summary
333
Total earthquakes
~250
Daily average
Elevated
Activity level
8
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.0
21 km NNE of Bejaïa, Algeria
00:04 UTC · 8.0 km deep
Felt by 146
5.5
212 km SW of Gizo, Solomon Islands
23:39 UTC · 5.0 km deep
5.3
182 km SSE of Ust’-Kamchatsk Staryy, Russia
00:09 UTC · 10.0 km deep
5.2
195 km WSW of Nabire, Indonesia
07:54 UTC · 10.0 km deep
Felt by 1
5.1
216 km SW of Gizo, Solomon Islands
22:14 UTC · 10.0 km deep
5.1
162 km SSE of Ust’-Kamchatsk Staryy, Russia
02:48 UTC · 10.0 km deep
5.1
157 km SSE of Ust’-Kamchatsk Staryy, Russia
02:21 UTC · 10.0 km deep
5.0
26 km NE of Bejaïa, Algeria
00:17 UTC · 10.0 km deep
Felt by 13
Earthquake Map — March 18, 2021
All Earthquakes — March 18, 2021
Showing 30 of 134 (filtered from 333)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-03-18 2021-03-18 23:55:54 UTC | 4.6mb | 209 km SW of Gizo, Solomon Islands -9.591°, 155.660° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place 209 km SW of Gizo, Solomon Islands on March 18, 2021 at 23:55 UTC. It arrived roughly 1 hours after a larger magnitude 5.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 23:50:10 UTC | 4.5mb | south of the Fiji Islands -24.540°, -176.002° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake south of the Fiji Islands came in on March 18, 2021 at 23:50 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 23:39:41 UTC | 5.5mww | 212 km SW of Gizo, Solomon Islands -9.560°, 155.584° | 5.0 km | - | II | green | ✓ Reviewed | USGS → |
A magnitude 5.5 earthquake was recorded 212 km SW of Gizo, Solomon Islands on March 18, 2021 at 23:39 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 M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 23:38:08 UTC | 2.0ml | 18 km ESE of Glacier View, Alaska 61.745°, -147.330° | 25.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 18 km ESE of Glacier View, Alaska on March 18, 2021, with origin time 23:38 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 23:35:16 UTC | 2.1md | 4 km S of P?hala, Hawaii 19.162°, -155.476° | 31.3 km | - | - | - | Auto | USGS → |
March 18, 2021 brought a magnitude 2.1 earthquake 4 km S of P?hala, Hawaii, logged at 23:35 UTC. Coming 1 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 23:29:47 UTC | 2.5ml | 20 km WNW of Volcano, Hawaii 19.495°, -155.422° | -0.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 20 km WNW of Volcano, Hawaii on March 18, 2021, with origin time 23:29 UTC. Coming 5 hours after a magnitude 3.5 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 M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 23:17:00 UTC | 2.2md | 7km NW of The Geysers, CA 38.825°, -122.803° | 2.8 km | - | - | - | ✓ Reviewed | USGS → |
March 18, 2021 brought a magnitude 2.2 earthquake 7km NW of The Geysers, CA, logged at 23:17 UTC. 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. | ||||||||
2021-03-18 2021-03-18 23:06:52 UTC | 2.7md | 3 km S of P?hala, Hawaii 19.174°, -155.475° | 31.9 km | 6 | - | - | ✓ Reviewed | USGS → |
On March 18, 2021, worldwide seismic activity registered a magnitude 2.7 earthquake 3 km S of P?hala, Hawaii at 23:06 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 22:50:25 UTC | 4.6mwr | 32 km S of Sand Point, Alaska 55.046°, -160.471° | 49.6 km | - | - | - | ✓ Reviewed | USGS → |
March 18, 2021 brought a magnitude 4.6 earthquake 32 km S of Sand Point, Alaska, logged at 22:50 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 22:40:16 UTC | 4.5mb | 85 km W of San Antonio de los Cobres, Argentina -24.076°, -67.148° | 206.8 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 85 km W of San Antonio de los Cobres, Argentina on March 18, 2021 at 22:40 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 22:39:47 UTC | 3.5ml | 55 km S of Whites City, New Mexico 31.673°, -104.399° | 6.1 km | - | IV | - | ✓ Reviewed | USGS → |
On March 18, 2021 at 22:39 UTC, a magnitude 3.5 earthquake struck 55 km S of Whites City, New Mexico. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 22:27:38 UTC | 4.6mb | 257 km SW of Gizo, Solomon Islands -9.728°, 155.165° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 18, 2021 at 22:27 UTC, a magnitude 4.6 earthquake struck 257 km SW of Gizo, Solomon Islands. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 22:27:30 UTC | 2.2ml | 32 km W of Nanwalek, Alaska 59.364°, -152.498° | 69.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 32 km W of Nanwalek, Alaska on March 18, 2021 at 22:27 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 22:16:48 UTC | 4.7mb | 213 km SW of Gizo, Solomon Islands -9.405°, 155.404° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake 213 km SW of Gizo, Solomon Islands at 22:16 UTC on March 18, 2021. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 22:14:43 UTC | 5.1mww | 216 km SW of Gizo, Solomon Islands -9.612°, 155.581° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:14 UTC on March 18, 2021, a magnitude 5.1 tremor occurred 216 km SW of Gizo, Solomon Islands. The event was offshore. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 21:56:22 UTC | 4.3mb | 85 km W of Basco, Philippines 20.500°, 121.151° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake 85 km W of Basco, Philippines with origin time 21:56 UTC on March 18, 2021. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 21:51:44 UTC | 4.3mb | 44 km E of Kinablangan, Philippines 7.741°, 126.950° | 57.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 18, 2021, worldwide seismic activity registered a magnitude 4.3 earthquake 44 km E of Kinablangan, Philippines at 21:51 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 21:29:55 UTC | 2.1md | 3 km S of P?hala, Hawaii 19.170°, -155.485° | 28.5 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.1 earthquake 3 km S of P?hala, Hawaii came in on March 18, 2021 at 21:29 UTC. 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. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 21:19:22 UTC | 2.0md | 2 km SSE of P?hala, Hawaii 19.179°, -155.466° | 36.1 km | - | - | - | Auto | USGS → |
A magnitude 2.0 earthquake was recorded 2 km SSE of P?hala, Hawaii on March 18, 2021 at 21:19 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. | ||||||||
2021-03-18 2021-03-18 21:07:58 UTC | 2.3md | 3 km SSW of P?hala, Hawaii 19.170°, -155.486° | 32.1 km | - | - | - | Auto | USGS → |
This magnitude 2.3 event was detected 3 km SSW of P?hala, Hawaii on March 18, 2021, with origin time 21:07 UTC. In the 72 hours after this event, the USGS recorded 9 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. | ||||||||
2021-03-18 2021-03-18 20:59:22 UTC | 4.3mb | 212 km SW of Gizo, Solomon Islands -9.503°, 155.522° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:59 UTC on March 18, 2021, a magnitude 4.3 tremor occurred 212 km SW of Gizo, Solomon Islands. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 20:21:45 UTC | 4.4mb | South Indian Ocean -37.604°, 51.506° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded near South Indian Ocean on March 18, 2021 at 20:21 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 20:20:34 UTC | 2.1md | 1 km SE of P?hala, Hawaii 19.194°, -155.464° | 36.5 km | - | - | - | Auto | USGS → |
At 20:20 UTC on March 18, 2021, a magnitude 2.1 tremor occurred 1 km SE of P?hala, Hawaii. It arrived roughly 18 hours after a larger magnitude 2.3 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. | ||||||||
2021-03-18 2021-03-18 20:10:22 UTC | 2.8ml | 21 km WNW of Volcano, Hawaii 19.482°, -155.432° | -1.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.8 earthquake 21 km WNW of Volcano, Hawaii with origin time 20:10 UTC on March 18, 2021. It arrived roughly 2 hours after a larger magnitude 3.5 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 M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 20:06:25 UTC | 4.1mb | Alamagan region, Northern Mariana Islands 17.962°, 145.730° | 205.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake in the Alamagan region, Northern Mariana Islands at 20:06 UTC on March 18, 2021. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 20:06:09 UTC | 2.0ml | 111 km SSE of Sand Point, Alaska 54.405°, -159.861° | 18.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 111 km SSE of Sand Point, Alaska came in on March 18, 2021 at 20:06 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 20:02:49 UTC | 2.3ml | 4 km SE of Black Diamond, Washington 47.275°, -121.966° | 12.8 km | 3 | - | - | ✓ Reviewed | USGS → |
On March 18, 2021, worldwide seismic activity registered a magnitude 2.3 earthquake 4 km SE of Black Diamond, Washington at 20:02 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 19:54:59 UTC | 2.4ml | 46 km E of Chignik, Alaska 56.282°, -157.657° | 44.9 km | - | - | - | ✓ Reviewed | USGS → |
March 18, 2021 brought a magnitude 2.4 earthquake 46 km E of Chignik, Alaska, logged at 19:54 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 19:52:42 UTC | 4.7mb | Volcano Islands, Japan region 23.159°, 143.800° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected in the Volcano Islands, Japan region on March 18, 2021, with origin time 19:52 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-18 2021-03-18 19:48:24 UTC | 2.5md | 9km NW of Pinnacles, CA 36.600°, -121.202° | 5.5 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 9km NW of Pinnacles, CA came in on March 18, 2021 at 19:48 UTC. It arrived roughly 1 hours after a larger magnitude 3.4 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. 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 March 18, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.