Earthquakes on April 28, 2023
341
EARTHQUAKES on April 28, 2023
24-hour UTC period · USGS data
LARGEST: M6.6 — south of the Fiji Islands
563 km deep · 2 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
9
M4.0–4.9
32
M3.0–3.9
16
M2.0–2.9
84
M1.0–1.9
200
Activity Summary
341
Total earthquakes
~250
Daily average
Elevated
Activity level
9
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.6
south of the Fiji Islands
03:13 UTC · 563.0 km deep
Felt by 2
6.0
south of the Fiji Islands
03:13 UTC · 587.6 km deep
5.7
157 km NE of Tual, Indonesia
09:19 UTC · 10.0 km deep
5.7
South Sandwich Islands region
01:07 UTC · 106.8 km deep
5.6
south of the Fiji Islands
03:51 UTC · 576.8 km deep
5.5
162 km NE of Tual, Indonesia
18:12 UTC · 10.0 km deep
5.5
south of the Fiji Islands
03:34 UTC · 570.1 km deep
5.3
Mid-Indian Ridge
03:54 UTC · 10.0 km deep
Earthquake Map — April 28, 2023
All Earthquakes — April 28, 2023
Showing 30 of 141 (filtered from 341)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-04-28 2023-04-28 23:45:04 UTC | 2.0ml | 46 km WNW of Nanwalek, Alaska 59.510°, -152.691° | 87.8 km | - | - | - | ✓ Reviewed | USGS → |
On April 28, 2023 at 23:45 UTC, a magnitude 2.0 earthquake struck 46 km WNW of Nanwalek, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 23:42:43 UTC | 2.3ml | New Mexico 32.010°, -103.803° | 8.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place near New Mexico on April 28, 2023 at 23:42 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 23:41:43 UTC | 2.0ml | 34 km SE of Malaga, New Mexico 32.008°, -103.806° | 8.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 34 km SE of Malaga, New Mexico on April 28, 2023 at 23:41 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 23:28:02 UTC | 2.9ml | 3km SSW of Heber, CA 32.703°, -115.537° | 10.2 km | 19 | - | - | ✓ Reviewed | USGS → |
On April 28, 2023 at 23:28 UTC, a magnitude 2.9 earthquake struck 3km SSW of Heber, CA. It arrived roughly 17 hours after a larger magnitude 3.2 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 23:27:58 UTC | 2.5ml | 3km S of Heber, CA 32.702°, -115.535° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 3km S of Heber, CA on April 28, 2023 at 23:27 UTC. It arrived roughly 17 hours after a larger magnitude 3.2 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. | ||||||||
2023-04-28 2023-04-28 23:26:47 UTC | 2.4ml | 3km SSW of Heber, CA 32.710°, -115.540° | 10.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 3km SSW of Heber, CA on April 28, 2023, with origin time 23:26 UTC. Coming 17 hours after a magnitude 3.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 23:24:44 UTC | 2.3ml | 3km SSW of Heber, CA 32.708°, -115.541° | 10.2 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 3km SSW of Heber, CA on April 28, 2023, with origin time 23:24 UTC. It arrived roughly 17 hours after a larger magnitude 3.2 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. | ||||||||
2023-04-28 2023-04-28 23:22:56 UTC | 3.2md | 52 km N of Isabela, Puerto Rico 18.968°, -67.110° | 8.9 km | - | - | - | ✓ Reviewed | USGS → |
On April 28, 2023 at 23:22 UTC, a magnitude 3.2 earthquake struck 52 km N of Isabela, Puerto Rico. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 23:14:34 UTC | 2.6ml | 3km SSW of Heber, CA 32.705°, -115.539° | 8.6 km | 6 | - | - | ✓ Reviewed | USGS → |
On April 28, 2023, worldwide seismic activity registered a magnitude 2.6 earthquake 3km SSW of Heber, CA at 23:14 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 16 hours earlier. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 23:06:08 UTC | 2.0ml | 16 km N of Meadow Lakes, Alaska 61.777°, -149.613° | 30.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 16 km N of Meadow Lakes, Alaska with origin time 23:06 UTC on April 28, 2023. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 22:55:15 UTC | 2.7ml | 218 km S of Adak, Alaska 49.926°, -176.262° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.7 event was detected 218 km S of Adak, Alaska on April 28, 2023, with origin time 22:55 UTC. It arrived roughly 2 hours after a larger magnitude 3.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 22:43:30 UTC | 2.7ml | 15 km E of Fox River, Alaska 59.856°, -150.678° | 28.2 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 15 km E of Fox River, Alaska came in on April 28, 2023 at 22:43 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 22:21:27 UTC | 2.1ml | 54 km S of Whites City, New Mexico 31.683°, -104.405° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 54 km S of Whites City, New Mexico with origin time 22:21 UTC on April 28, 2023. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 21:54:02 UTC | 2.1ml | 52 km SSW of Adak, Alaska 51.474°, -177.048° | 37.5 km | - | - | - | ✓ Reviewed | USGS → |
On April 28, 2023, worldwide seismic activity registered a magnitude 2.1 earthquake 52 km SSW of Adak, Alaska at 21:54 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 21:42:20 UTC | 3.5md | 74 km NW of Rincón, Puerto Rico 18.861°, -67.698° | 3.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.5 earthquake 74 km NW of Rincón, Puerto Rico with origin time 21:42 UTC on April 28, 2023. 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. | ||||||||
2023-04-28 2023-04-28 21:40:30 UTC | 2.0md | 6 km SW of Volcano, Hawaii 19.405°, -155.287° | 1.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 6 km SW of Volcano, Hawaii on April 28, 2023, with origin time 21:40 UTC. 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 21:24:40 UTC | 3.1ml | south of Alaska 54.738°, -157.870° | 9.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.1 earthquake south of Alaska with origin time 21:24 UTC on April 28, 2023. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 21:23:14 UTC | 2.4ml | 11 km SE of P?hala, Hawaii 19.117°, -155.417° | 30.9 km | - | - | - | Auto | USGS → |
April 28, 2023 brought a magnitude 2.4 earthquake 11 km SE of P?hala, Hawaii, logged at 21:23 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:46:34 UTC | 4.8mb | Simeulue, Indonesia 2.550°, 96.633° | 35.5 km | 1 | - | - | ✓ Reviewed | USGS → |
On April 28, 2023, worldwide seismic activity registered a magnitude 4.8 earthquake near Simeulue, Indonesia at 20:46 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:45:42 UTC | 3.2ml | 228 km S of Adak, Alaska 49.828°, -176.304° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.2 event was detected 228 km S of Adak, Alaska on April 28, 2023, with origin time 20:45 UTC. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:38:30 UTC | 4.9mww | Sumbawa region, Indonesia -8.723°, 118.984° | 115.6 km | 1 | - | - | ✓ Reviewed | USGS → |
April 28, 2023 brought a magnitude 4.9 earthquake in the Sumbawa region, Indonesia, logged at 20:38 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:23:05 UTC | 4.1mb | 149 km NE of Tual, Indonesia -4.761°, 133.790° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake 149 km NE of Tual, Indonesia came in on April 28, 2023 at 20:23 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.7 earthquake that occurred about 11 hours earlier. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:16:56 UTC | 2.2ml | 15km WNW of Ojai, CA 34.502°, -119.395° | 1.7 km | - | - | - | ✓ Reviewed | USGS → |
April 28, 2023 brought a magnitude 2.2 earthquake 15km WNW of Ojai, CA, logged at 20:16 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. | ||||||||
2023-04-28 2023-04-28 20:15:25 UTC | 2.3md | 16km WNW of Klamath, CA 41.605°, -124.179° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
April 28, 2023 brought a magnitude 2.3 earthquake 16km WNW of Klamath, CA, logged at 20:15 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:07:01 UTC | 4.9mb | 292 km NNW of Sabang, Indonesia 8.257°, 94.131° | 18.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 28, 2023 at 20:07 UTC, a magnitude 4.9 earthquake struck 292 km NNW of Sabang, Indonesia. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:06:56 UTC | 2.0ml | 3km SSW of Heber, CA 32.703°, -115.541° | 8.5 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 3km SSW of Heber, CA on April 28, 2023 at 20:06 UTC. Coming 13 hours after a magnitude 3.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:03:47 UTC | 2.4ml | 13 km SSE of Kanarraville, Utah 37.429°, -113.127° | 10.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.4 earthquake 13 km SSE of Kanarraville, Utah came in on April 28, 2023 at 20:03 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 20:02:12 UTC | 2.9ml | Rat Islands, Aleutian Islands, Alaska 51.091°, 178.305° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
April 28, 2023 brought a magnitude 2.9 earthquake near Rat Islands, Aleutian Islands, Alaska, logged at 20:02 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 19:55:35 UTC | 2.0md | 0 km SSW of P?hala, Hawaii 19.198°, -155.480° | 31.3 km | - | - | - | Auto | USGS → |
On April 28, 2023, worldwide seismic activity registered a magnitude 2.0 earthquake 0 km SSW of P?hala, Hawaii at 19:55 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.3 earthquake that occurred about 2 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-28 2023-04-28 19:55:05 UTC | 2.7ml | 102 km ESE of Atka, Alaska 51.782°, -172.869° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 102 km ESE of Atka, Alaska on April 28, 2023 at 19:55 UTC. See the M2.7 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, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.