Earthquakes on April 27, 2021
318
EARTHQUAKES on April 27, 2021
24-hour UTC period · USGS data
10 km deep · 2 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
11
M4.0–4.9
55
M3.0–3.9
11
M2.0–2.9
53
M1.0–1.9
188
Activity Summary
318
Total earthquakes
~250
Daily average
Elevated
Activity level
11
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.1
176 km ENE of Angoram, Papua New Guinea
08:05 UTC · 10.0 km deep
Felt by 2
5.9
Kermadec Islands region
16:33 UTC · 13.0 km deep
5.6
179 km ENE of Angoram, Papua New Guinea
02:12 UTC · 10.0 km deep
Felt by 1
5.5
192 km ENE of Angoram, Papua New Guinea
11:04 UTC · 10.0 km deep
5.3
Kermadec Islands region
17:53 UTC · 10.0 km deep
5.3
179 km ENE of Angoram, Papua New Guinea
10:40 UTC · 10.0 km deep
5.1
Kermadec Islands region
16:43 UTC · 10.0 km deep
5.1
192 km ENE of Angoram, Papua New Guinea
08:13 UTC · 10.0 km deep
Earthquake Map — April 27, 2021
All Earthquakes — April 27, 2021
Showing 30 of 130 (filtered from 318)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-04-27 2021-04-27 23:53:43 UTC | 2.0ml | 54 km WNW of Ninilchik, Alaska 60.283°, -152.536° | 89.7 km | - | - | - | ✓ Reviewed | USGS → |
At 23:53 UTC on April 27, 2021, a magnitude 2.0 tremor occurred 54 km WNW of Ninilchik, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 23:35:58 UTC | 2.2ml | 145 km W of Adak, Alaska 51.664°, -178.720° | 164.8 km | - | - | - | ✓ Reviewed | USGS → |
On April 27, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 145 km W of Adak, Alaska at 23:35 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 23:35:45 UTC | 4.1mb | 100 km SSE of Atlasovo, Russia 54.774°, 160.269° | 115.4 km | - | - | - | ✓ Reviewed | USGS → |
April 27, 2021 brought a magnitude 4.1 earthquake 100 km SSE of Atlasovo, Russia, logged at 23:35 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 23:33:41 UTC | 2.7ml | 165 km ESE of Akutan, Alaska 53.357°, -163.645° | 20.4 km | - | - | - | ✓ Reviewed | USGS → |
At 23:33 UTC on April 27, 2021, a magnitude 2.7 tremor occurred 165 km ESE of Akutan, Alaska. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 23:32:54 UTC | 2.3ml | 65 km SSE of Kokhanok, Alaska 58.884°, -154.400° | 122.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 65 km SSE of Kokhanok, Alaska at 23:32 UTC on April 27, 2021. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 23:22:53 UTC | 2.5ml | 67 km WSW of Nanwalek, Alaska 59.122°, -153.009° | 69.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 67 km WSW of Nanwalek, Alaska on April 27, 2021 at 23:22 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 23:14:24 UTC | 2.1ml | 98 km SSE of Sand Point, Alaska 54.588°, -159.688° | 26.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 98 km SSE of Sand Point, Alaska on April 27, 2021 at 23:14 UTC. It arrived roughly 10 hours after a larger magnitude 3.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 23:04:58 UTC | 2.3ml | 2 km ESE of P?hala, Hawaii 19.194°, -155.460° | 35.9 km | 1 | - | - | Auto | USGS → |
A magnitude 2.3 seismic event took place 2 km ESE of P?hala, Hawaii on April 27, 2021 at 23:04 UTC. Coming 5 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. | ||||||||
2021-04-27 2021-04-27 22:11:18 UTC | 4.5mb | 170 km N of Madang, Papua New Guinea -3.703°, 146.063° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 170 km N of Madang, Papua New Guinea on April 27, 2021 at 22:11 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 22:10:53 UTC | 4.5mwr | 53 km E of Yujing, Taiwan 23.089°, 120.981° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 53 km E of Yujing, Taiwan with origin time 22:10 UTC on April 27, 2021. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 22:07:08 UTC | 4.2mb | 146 km SE of Atlasovo, Russia 54.674°, 161.268° | 63.7 km | - | - | - | ✓ Reviewed | USGS → |
At 22:07 UTC on April 27, 2021, a magnitude 4.2 tremor occurred 146 km SE of Atlasovo, Russia. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 21:50:27 UTC | 2.0md | 4 km SE of La Parguera, Puerto Rico 17.947°, -67.022° | 4.0 km | - | - | - | ✓ Reviewed | USGS → |
April 27, 2021 brought a magnitude 2.0 earthquake 4 km SE of La Parguera, Puerto Rico, logged at 21:50 UTC. Coming 1 hours after a magnitude 2.6 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. | ||||||||
2021-04-27 2021-04-27 21:23:23 UTC | 2.6md | 6 km SSE of Maria Antonia, Puerto Rico 17.929°, -66.865° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 6 km SSE of Maria Antonia, Puerto Rico came in on April 27, 2021 at 21:23 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 21:07:28 UTC | 2.8ml | 104 km WSW of Adak, Alaska 51.633°, -178.102° | 29.8 km | - | - | - | ✓ Reviewed | USGS → |
April 27, 2021 brought a magnitude 2.8 earthquake 104 km WSW of Adak, Alaska, logged at 21:07 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 20:17:45 UTC | 4.7mb | Bonin Islands, Japan region 26.717°, 141.490° | 110.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 earthquake was recorded in the Bonin Islands, Japan region on April 27, 2021 at 20:17 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 19:53:28 UTC | 2.4ml | 56 km S of Whites City, New Mexico 31.666°, -104.367° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 earthquake was recorded 56 km S of Whites City, New Mexico on April 27, 2021 at 19:53 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 19:42:11 UTC | 4.0ml | 56 km S of Whites City, New Mexico 31.663°, -104.370° | 7.4 km | 2 | IV | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.0 earthquake 56 km S of Whites City, New Mexico at 19:42 UTC on April 27, 2021. 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 M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 19:30:37 UTC | 4.9mb | southern Mid-Atlantic Ridge -38.094°, -17.107° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.9 earthquake was recorded near southern Mid-Atlantic Ridge on April 27, 2021 at 19:30 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 19:29:42 UTC | 2.9ml | 138 km SSE of Sand Point, Alaska 54.227°, -159.530° | 24.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.9 earthquake 138 km SSE of Sand Point, Alaska came in on April 27, 2021 at 19:29 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 19:00:03 UTC | 2.1ml | 24 km SE of Caliente, Nevada 37.444°, -114.329° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
April 27, 2021 brought a magnitude 2.1 earthquake 24 km SE of Caliente, Nevada, logged at 19:00 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 18:52:01 UTC | 4.6mb | Kermadec Islands region -29.136°, -176.700° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.6 event was detected in the Kermadec Islands region on April 27, 2021, with origin time 18:52 UTC. Coming 2 hours after a magnitude 5.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 18:46:09 UTC | 4.4mb | 146 km SSE of Isangel, Vanuatu -20.772°, 169.803° | 138.7 km | - | - | - | ✓ Reviewed | USGS → |
On April 27, 2021 at 18:46 UTC, a magnitude 4.4 earthquake struck 146 km SSE of Isangel, Vanuatu. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 18:37:04 UTC | 4.3mb | Kermadec Islands region -28.906°, -176.671° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 27, 2021 at 18:37 UTC, a magnitude 4.3 earthquake struck in the Kermadec Islands region. Coming 2 hours after a magnitude 4.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 18:28:58 UTC | 4.9mb | Kermadec Islands region -29.416°, -176.766° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.9 earthquake in the Kermadec Islands region with origin time 18:28 UTC on April 27, 2021. It arrived roughly 2 hours after a larger magnitude 5.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 18:27:20 UTC | 2.2ml | 1km N of Lennox, CA 33.943°, -118.353° | 20.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 1km N of Lennox, CA at 18:27 UTC on April 27, 2021. It arrived roughly 2 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 M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 18:17:48 UTC | 2.1ml | 0km N of Lennox, CA 33.943°, -118.352° | 21.0 km | 1 | - | - | ✓ Reviewed | USGS → |
At 18:17 UTC on April 27, 2021, a magnitude 2.1 tremor occurred 0km N of Lennox, CA. It arrived roughly 2 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. | ||||||||
2021-04-27 2021-04-27 18:12:13 UTC | 2.0ml | 5 km E of P?hala, Hawaii 19.205°, -155.426° | 36.3 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.0 earthquake 5 km E of P?hala, Hawaii with origin time 18:12 UTC on April 27, 2021. Coming 1 hours after a magnitude 2.4 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. | ||||||||
2021-04-27 2021-04-27 17:54:36 UTC | 4.8ml | Southern Alaska 61.342°, -149.980° | 43.8 km | 1,122 | IV | green | ✓ Reviewed | USGS → |
A magnitude 4.8 seismic event took place near Southern Alaska on April 27, 2021 at 17:54 UTC. 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 M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 17:53:06 UTC | 5.3mww | Kermadec Islands region -29.713°, -176.877° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 17:53 UTC on April 27, 2021, a magnitude 5.3 tremor occurred in the Kermadec Islands region. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-27 2021-04-27 17:48:53 UTC | 2.4ml | 5 km ENE of P?hala, Hawaii 19.222°, -155.433° | 34.3 km | - | - | - | Auto | USGS → |
On April 27, 2021, worldwide seismic activity registered a magnitude 2.4 earthquake 5 km ENE of P?hala, Hawaii at 17:48 UTC. 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 M2.4 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 27, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.