Earthquakes on April 7, 2021
384
EARTHQUAKES on April 7, 2021
24-hour UTC period · USGS data
LARGEST: M6.1 — Kermadec Islands region
18 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
8
M4.0–4.9
56
M3.0–3.9
19
M2.0–2.9
71
M1.0–1.9
230
Activity Summary
384
Total earthquakes
~250
Daily average
Elevated
Activity level
8
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.1
Kermadec Islands region
09:53 UTC · 18.0 km deep
5.7
Kermadec Islands region
18:48 UTC · 13.0 km deep
5.6
203 km ENE of Kokopo, Papua New Guinea
05:13 UTC · 427.6 km deep
Felt by 1
5.4
Kermadec Islands region
10:42 UTC · 10.0 km deep
5.2
Kermadec Islands region
19:43 UTC · 10.0 km deep
5.1
Kermadec Islands region
13:34 UTC · 10.0 km deep
5.1
Kermadec Islands region
10:26 UTC · 10.0 km deep
5.0
Kermadec Islands region
19:58 UTC · 7.0 km deep
Earthquake Map — April 7, 2021
All Earthquakes — April 7, 2021
Showing 30 of 154 (filtered from 384)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-04-07 2021-04-07 23:58:51 UTC | 2.3ml | 126 km SSE of Sand Point, Alaska 54.270°, -159.833° | 37.7 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 126 km SSE of Sand Point, Alaska came in on April 7, 2021 at 23:58 UTC. It arrived roughly 20 hours after a larger magnitude 3.3 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. | ||||||||
2021-04-07 2021-04-07 23:50:33 UTC | 4.6mb | Banda Sea -6.546°, 129.821° | 164.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 earthquake was recorded near Banda Sea on April 7, 2021 at 23:50 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 23:24:15 UTC | 4.2mb | south of the Fiji Islands -23.736°, 179.241° | 549.5 km | - | - | - | ✓ Reviewed | USGS → |
At 23:24 UTC on April 7, 2021, a magnitude 4.2 tremor occurred south of the Fiji Islands. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 23:14:26 UTC | 4.6mwr | 68 km NNW of Las Ovejas, Argentina -36.394°, -70.940° | 137.5 km | 5 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.6 earthquake 68 km NNW of Las Ovejas, Argentina with origin time 23:14 UTC on April 7, 2021. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 23:06:17 UTC | 2.5ml | 9 km SSE of Atka, Alaska 52.112°, -174.171° | 187.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 9 km SSE of Atka, Alaska came in on April 7, 2021 at 23:06 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:51:04 UTC | 2.3ml | 43 km NW of Toyah, Texas 31.554°, -104.151° | 6.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 43 km NW of Toyah, Texas on April 7, 2021 at 22:51 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:50:57 UTC | 2.0ml | 114 km SSE of Sand Point, Alaska 54.410°, -159.731° | 29.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 114 km SSE of Sand Point, Alaska at 22:50 UTC on April 7, 2021. This event falls inside the aftershock decay of a nearby magnitude 3.3 earthquake that occurred about 19 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:49:53 UTC | 3.2ml | 67 km E of Atka, Alaska 52.284°, -173.229° | 11.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.2 earthquake was recorded 67 km E of Atka, Alaska on April 7, 2021 at 22:49 UTC. Coming 1 hours after a magnitude 3.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:48:56 UTC | 2.0ml | 60 km E of Atka, Alaska 52.299°, -173.338° | 2.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 60 km E of Atka, Alaska on April 7, 2021, with origin time 22:48 UTC. Coming 1 hours after a magnitude 3.9 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:42:41 UTC | 2.3ml | 3 km NNE of P?hala, Hawaii 19.229°, -155.464° | 33.9 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.3 earthquake 3 km NNE of P?hala, Hawaii at 22:42 UTC on April 7, 2021. Coming 20 hours after a magnitude 2.7 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. | ||||||||
2021-04-07 2021-04-07 22:35:20 UTC | 4.3mb | Kermadec Islands region -28.625°, -176.507° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 7, 2021, worldwide seismic activity registered a magnitude 4.3 earthquake in the Kermadec Islands region at 22:35 UTC. It arrived roughly 1 hours after a larger magnitude 4.6 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:35:06 UTC | 4.0mb | 19 km S of Mandráki, Greece 36.435°, 27.121° | 11.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 earthquake was recorded 19 km S of Mandráki, Greece on April 7, 2021 at 22:35 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.6 earthquake that occurred about 15 hours earlier. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:28:16 UTC | 3.1ml | 74 km E of Atka, Alaska 52.291°, -173.121° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 seismic event took place 74 km E of Atka, Alaska on April 7, 2021 at 22:28 UTC. It arrived roughly 1 hours after a larger magnitude 3.9 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:21:20 UTC | 3.9ml | 74 km E of Atka, Alaska 52.228°, -173.118° | 6.2 km | - | - | - | ✓ Reviewed | USGS → |
At 22:21 UTC on April 7, 2021, a magnitude 3.9 tremor occurred 74 km E of Atka, Alaska. 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 M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 22:12:42 UTC | 2.9ml | 217 km SE of Chiniak, Alaska 56.225°, -149.758° | 20.9 km | - | - | - | ✓ Reviewed | USGS → |
At 22:12 UTC on April 7, 2021, a magnitude 2.9 tremor occurred 217 km SE of Chiniak, Alaska. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 21:54:57 UTC | 4.2mb | 20 km S of Mandráki, Greece 36.426°, 27.102° | 11.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.2 earthquake 20 km S of Mandráki, Greece at 21:54 UTC on April 7, 2021. It arrived roughly 15 hours after a larger magnitude 4.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 21:49:43 UTC | 2.0md | 11 km E of P?hala, Hawaii 19.195°, -155.372° | 33.7 km | - | - | - | Auto | USGS → |
At 21:49 UTC on April 7, 2021, a magnitude 2.0 tremor occurred 11 km E of P?hala, Hawaii. It arrived roughly 19 hours after a larger magnitude 2.7 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 21:43:09 UTC | 2.2ml | Andreanof Islands, Aleutian Islands, Alaska 51.036°, -173.839° | 15.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place near Andreanof Islands, Aleutian Islands, Alaska on April 7, 2021 at 21:43 UTC. Coming 7 hours after a magnitude 2.8 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. | ||||||||
2021-04-07 2021-04-07 21:36:51 UTC | 4.6mb | Kermadec Islands region -28.709°, -176.436° | 9.1 km | - | - | - | ✓ Reviewed | USGS → |
On April 7, 2021, worldwide seismic activity registered a magnitude 4.6 earthquake in the Kermadec Islands region at 21:36 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.7 earthquake that occurred about 3 hours earlier. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 21:35:34 UTC | 4.6mb | Kermadec Islands region -28.558°, -176.719° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:35 UTC on April 7, 2021, a magnitude 4.6 tremor occurred in the Kermadec Islands region. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 21:33:56 UTC | 2.0ml | 105 km SE of King Cove, Alaska 54.307°, -161.321° | 9.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 105 km SE of King Cove, Alaska came in on April 7, 2021 at 21:33 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 21:28:20 UTC | 3.8mb | 112 km NNW of San Antonio de los Cobres, Argentina -23.350°, -66.897° | 211.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.8 earthquake 112 km NNW of San Antonio de los Cobres, Argentina at 21:28 UTC on April 7, 2021. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 21:18:36 UTC | 4.2mb | 33 km WSW of Paramonga, Peru -10.742°, -78.133° | 52.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 33 km WSW of Paramonga, Peru on April 7, 2021, with origin time 21:18 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 21:16:14 UTC | 4.5mb | Kermadec Islands region -28.390°, -176.881° | 19.9 km | - | - | - | ✓ Reviewed | USGS → |
On April 7, 2021 at 21:16 UTC, a magnitude 4.5 earthquake struck in the Kermadec Islands region. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 20:54:42 UTC | 3.1ml | 32 km NE of Ranchester, Wyoming 45.124°, -106.891° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
April 7, 2021 brought a magnitude 3.1 earthquake 32 km NE of Ranchester, Wyoming, logged at 20:54 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 20:50:49 UTC | 2.3ml | 7 km E of P?hala, Hawaii 19.207°, -155.410° | 34.2 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.3 earthquake 7 km E of P?hala, Hawaii at 20:50 UTC on April 7, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 18 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 20:41:59 UTC | 2.9ml | 22km NNE of Barstow, CA 35.093°, -116.963° | 1.9 km | 2 | - | - | ✓ Reviewed | USGS → |
On April 7, 2021, worldwide seismic activity registered a magnitude 2.9 earthquake 22km NNE of Barstow, CA at 20:41 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 20:36:24 UTC | 4.3mb | Kermadec Islands region -28.682°, -176.698° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:36 UTC on April 7, 2021, a magnitude 4.3 tremor occurred in the Kermadec Islands region. This event falls inside the aftershock decay of a nearby magnitude 5.4 earthquake that occurred about 10 hours earlier. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 20:18:17 UTC | 3.3ml | 23km S of South Dos Palos, CA 36.765°, -120.701° | 3.5 km | 8 | III | - | ✓ Reviewed | USGS → |
A magnitude 3.3 seismic event took place 23km S of South Dos Palos, CA on April 7, 2021 at 20:18 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-07 2021-04-07 20:01:43 UTC | 2.3ml | 5 km E of P?hala, Hawaii 19.206°, -155.428° | 30.7 km | - | - | - | Auto | USGS → |
At 20:01 UTC on April 7, 2021, a magnitude 2.3 tremor occurred 5 km E of P?hala, Hawaii. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 17 hours earlier. The event was offshore. See the M2.3 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 April 7, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.