Earthquakes on April 28, 2021
358
EARTHQUAKES on April 28, 2021
24-hour UTC period · USGS data
LARGEST: M6.0 — 8 km NNW of Dhekiajuli, India
34 km deep · 269 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
44
M3.0–3.9
8
M2.0–2.9
70
M1.0–1.9
232
Activity Summary
358
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Significant Earthquakes (M4.5+)
6.0
8 km NNW of Dhekiajuli, India
02:21 UTC · 34.0 km deep
Felt by 269
5.1
Kermadec Islands region
02:57 UTC · 10.0 km deep
5.0
Kermadec Islands region
04:24 UTC · 10.0 km deep
05.0
6 km NE of Dhekiajuli, India
02:33 UTC · 35.0 km deep
Felt by 32
4.8
4 km N of Dhekiajuli, India
19:50 UTC · 38.2 km deep
Felt by 28
4.8
Kermadec Islands region
15:25 UTC · 10.0 km deep
4.7
Near the coast of Libertador O'Higgins, Chile
18:25 UTC · 12.8 km deep
4.7
159 km S of Sinabang, Indonesia
11:33 UTC · 10.0 km deep
Earthquake Map — April 28, 2021
All Earthquakes — April 28, 2021
Showing 30 of 126 (filtered from 358)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-04-28 2021-04-28 23:24:03 UTC | 2.5ml | 53 km SSW of Whites City, New Mexico 31.723°, -104.578° | 5.6 km | - | - | - | ✓ Reviewed | USGS → |
At 23:24 UTC on April 28, 2021, a magnitude 2.5 tremor occurred 53 km SSW of Whites City, New Mexico. Coming 21 hours after a magnitude 3.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 23:21:02 UTC | 3.0ml | off the coast of Oregon 43.507°, -128.559° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:21 UTC on April 28, 2021, a magnitude 3.0 tremor occurred near off the coast of Oregon. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 23:18:39 UTC | 2.1ml | 228 km SW of Yakutat, Alaska 58.150°, -142.623° | 11.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 228 km SW of Yakutat, Alaska at 23:18 UTC on April 28, 2021. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 22:45:26 UTC | 2.8md | 4 km WSW of Guánica, Puerto Rico 17.957°, -66.951° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:45 UTC on April 28, 2021, a magnitude 2.8 tremor occurred 4 km WSW of Guánica, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 3.4 earthquake that occurred about 5 hours earlier. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 22:09:00 UTC | 2.9ml | 45 km ENE of Tonopah, Nevada 38.175°, -116.727° | 11.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 45 km ENE of Tonopah, Nevada on April 28, 2021 at 22:09 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.1 earthquake that occurred about 10 hours earlier. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 22:08:23 UTC | 2.8md | 4 km SW of Fuig, Puerto Rico 17.963°, -66.951° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 28, 2021, worldwide seismic activity registered a magnitude 2.8 earthquake 4 km SW of Fuig, Puerto Rico at 22:08 UTC. It arrived roughly 4 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 M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 21:50:07 UTC | 4.1mb | 78 km SW of San Antonio, Chile -34.006°, -72.295° | 23.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected 78 km SW of San Antonio, Chile on April 28, 2021, with origin time 21:50 UTC. It arrived roughly 3 hours after a larger magnitude 4.7 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 21:41:47 UTC | 4.4mb | Kermadec Islands region -28.275°, -176.992° | 43.5 km | - | - | - | ✓ Reviewed | USGS → |
April 28, 2021 brought a magnitude 4.4 earthquake in the Kermadec Islands region, logged at 21:41 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 21:36:24 UTC | 4.4mb | off the coast of Oregon 43.875°, -128.085° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 28, 2021 at 21:36 UTC, a magnitude 4.4 earthquake struck near off the coast of Oregon. A tsunami evaluation was automatically initiated given the magnitude and location. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 21:22:41 UTC | 2.0ml | 3 km SE of Eagle Point, Oregon 42.449°, -122.770° | -1.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 3 km SE of Eagle Point, Oregon on April 28, 2021, with origin time 21:22 UTC. 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. | ||||||||
2021-04-28 2021-04-28 21:20:28 UTC | 2.1ml | 32 km NNE of Benton, California 38.064°, -118.279° | 4.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 32 km NNE of Benton, California on April 28, 2021, with origin time 21:20 UTC. 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. | ||||||||
2021-04-28 2021-04-28 21:04:53 UTC | 4.1mb | 168 km SSW of Port-Vila, Vanuatu -19.048°, 167.503° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake 168 km SSW of Port-Vila, Vanuatu came in on April 28, 2021 at 21:04 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 20:55:19 UTC | 2.0md | 18 km E of Naalehu, Hawaii 19.041°, -155.411° | 47.8 km | - | - | - | ✓ Reviewed | USGS → |
At 20:55 UTC on April 28, 2021, a magnitude 2.0 tremor occurred 18 km E of Naalehu, 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. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 20:49:51 UTC | 4.5mb | Kermadec Islands region -29.336°, -176.826° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 28, 2021, worldwide seismic activity registered a magnitude 4.5 earthquake in the Kermadec Islands region at 20:49 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.1 earthquake that occurred about 18 hours earlier. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 20:46:43 UTC | 2.3ml | 17 km ESE of Naalehu, Hawaii 19.028°, -155.417° | 33.3 km | - | - | - | Auto | USGS → |
This magnitude 2.3 event was detected 17 km ESE of Naalehu, Hawaii on April 28, 2021, with origin time 20:46 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 20:39:00 UTC | 4.4mb | Kermadec Islands region -28.485°, -177.792° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded in the Kermadec Islands region on April 28, 2021 at 20:39 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 20:36:09 UTC | 4.4mb | Kermadec Islands region -28.369°, -177.361° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake in the Kermadec Islands region with origin time 20:36 UTC on April 28, 2021. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 20:33:13 UTC | 2.2md | 3 km N of Indios, Puerto Rico 18.023°, -66.822° | 16.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 3 km N of Indios, Puerto Rico at 20:33 UTC on April 28, 2021. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 20:25:31 UTC | 2.6ml | 105 km S of Unalaska, Alaska 52.934°, -166.786° | 31.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 105 km S of Unalaska, Alaska with origin time 20:25 UTC on April 28, 2021. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 20:16:27 UTC | 2.0ml | 55 km W of Mentone, Texas 31.698°, -104.185° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 55 km W of Mentone, Texas on April 28, 2021 at 20:16 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 19:50:53 UTC | 4.8mb | 4 km N of Dhekiajuli, India 26.748°, 92.485° | 38.2 km | 28 | - | - | ✓ Reviewed | USGS → |
At 19:50 UTC on April 28, 2021, a magnitude 4.8 tremor occurred 4 km N of Dhekiajuli, India. This event falls inside the aftershock decay of a nearby magnitude 6.0 earthquake that occurred about 17 hours earlier. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 19:33:38 UTC | 2.6md | 32km WNW of Ferndale, CA 40.691°, -124.607° | 22.6 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 32km WNW of Ferndale, CA on April 28, 2021 at 19:33 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 19:33:33 UTC | 4.6mb | 72 km N of Opotiki, New Zealand -37.358°, 177.311° | 164.5 km | - | - | - | ✓ Reviewed | USGS → |
April 28, 2021 brought a magnitude 4.6 earthquake 72 km N of Opotiki, New Zealand, logged at 19:33 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 19:18:35 UTC | 2.8ml | 8 km S of Honaunau-Napoopoo, Hawaii 19.382°, -155.852° | 12.5 km | 3 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.8 earthquake 8 km S of Honaunau-Napoopoo, Hawaii with origin time 19:18 UTC on April 28, 2021. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 19:10:02 UTC | 4.1mb | 228 km E of Levuka, Fiji -17.718°, -178.557° | 543.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place 228 km E of Levuka, Fiji on April 28, 2021 at 19:10 UTC. Coming 5 hours after a magnitude 4.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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. | ||||||||
2021-04-28 2021-04-28 18:58:51 UTC | 4.5mb | 12 km SSE of Yacuiba, Bolivia -22.124°, -63.637° | 523.2 km | 1 | - | - | ✓ Reviewed | USGS → |
At 18:58 UTC on April 28, 2021, a magnitude 4.5 tremor occurred 12 km SSE of Yacuiba, Bolivia. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 18:34:12 UTC | 4.2mb | 88 km WSW of San Antonio, Chile -34.025°, -72.406° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 seismic event took place 88 km WSW of San Antonio, Chile on April 28, 2021 at 18:34 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.7 earthquake that occurred about 1 hours earlier. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 18:25:11 UTC | 4.7mb | Near the coast of Libertador O'Higgins, Chile -34.026°, -72.370° | 12.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected near Near the coast of Libertador O'Higgins, Chile on April 28, 2021, with origin time 18:25 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 18:24:48 UTC | 2.2ml | 95 km WSW of Karluk, Alaska 57.218°, -155.905° | 61.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 95 km WSW of Karluk, Alaska came in on April 28, 2021 at 18:24 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-28 2021-04-28 18:04:50 UTC | 3.5ml | 33 km SW of Birney, Montana 45.134°, -106.852° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.5 seismic event took place 33 km SW of Birney, Montana on April 28, 2021 at 18:04 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.5 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 April 28, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.