Earthquakes on April 17, 2023
317
EARTHQUAKES on April 17, 2023
24-hour UTC period · USGS data
LARGEST: M5.4 — Kermadec Islands region
11 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
53
M3.0–3.9
14
M2.0–2.9
61
M1.0–1.9
185
Activity Summary
317
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.4
Kermadec Islands region
19:57 UTC · 11.3 km deep
5.2
Kermadec Islands region
11:01 UTC · 10.0 km deep
Felt by 1
5.1
Kermadec Islands region
13:26 UTC · 10.0 km deep
5.1
99 km SSW of Pagar Alam, Indonesia
11:05 UTC · 62.6 km deep
Felt by 7
4.9
Kuril Islands
23:26 UTC · 35.0 km deep
Felt by 1
4.9
Kermadec Islands region
21:36 UTC · 10.0 km deep
4.9
48 km SE of Ambunti, Papua New Guinea
20:06 UTC · 89.5 km deep
Felt by 2
4.9
New Britain region, Papua New Guinea
19:12 UTC · 10.0 km deep
Earthquake Map — April 17, 2023
All Earthquakes — April 17, 2023
Showing 30 of 132 (filtered from 317)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-04-17 2023-04-17 23:26:05 UTC | 4.9mb | Kuril Islands 46.602°, 152.763° | 35.0 km | 1 | - | - | ✓ Reviewed | USGS → |
At 23:26 UTC on April 17, 2023, a magnitude 4.9 tremor occurred near Kuril Islands. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 23:21:59 UTC | 3.0ml | 119 km SSW of Atka, Alaska 51.236°, -174.974° | 30.7 km | - | - | - | ✓ Reviewed | USGS → |
April 17, 2023 brought a magnitude 3.0 earthquake 119 km SSW of Atka, Alaska, logged at 23:21 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 22:59:27 UTC | 2.0md | 10 km E of P?hala, Hawaii 19.191°, -155.378° | 30.8 km | - | - | - | Auto | USGS → |
A magnitude 2.0 seismic event took place 10 km E of P?hala, Hawaii on April 17, 2023 at 22:59 UTC. Coming 10 hours after a magnitude 3.1 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. | ||||||||
2023-04-17 2023-04-17 22:51:27 UTC | 4.6mb | Kermadec Islands region -31.633°, -179.073° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
April 17, 2023 brought a magnitude 4.6 earthquake in the Kermadec Islands region, logged at 22:51 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.9 earthquake that occurred about 1 hours earlier. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 22:51:17 UTC | 2.4md | 4 km WSW of Fuig, Puerto Rico 17.971°, -66.956° | 16.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 4 km WSW of Fuig, Puerto Rico on April 17, 2023 at 22:51 UTC. Coming 22 hours after a magnitude 3.0 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. | ||||||||
2023-04-17 2023-04-17 22:50:21 UTC | 4.2mb | 272 km WNW of Houma, Tonga -20.239°, -177.720° | 520.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 272 km WNW of Houma, Tonga on April 17, 2023, with origin time 22:50 UTC. 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. | ||||||||
2023-04-17 2023-04-17 22:35:39 UTC | 4.4mb | 18 km ESE of Santa Maria, Philippines 7.904°, 126.589° | 10.1 km | - | - | - | ✓ Reviewed | USGS → |
On April 17, 2023 at 22:35 UTC, a magnitude 4.4 earthquake struck 18 km ESE of Santa Maria, Philippines. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 22:31:13 UTC | 2.1ml | 1 km SSE of Markleeville, California 38.683°, -119.778° | 10.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 1 km SSE of Markleeville, California on April 17, 2023, with origin time 22:31 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 22:17:27 UTC | 4.2mb | 82 km SSE of Karpathos, Greece 34.876°, 27.697° | 50.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.2 earthquake 82 km SSE of Karpathos, Greece came in on April 17, 2023 at 22:17 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 22:12:24 UTC | 2.5ml | 16 km NE of Hermleigh, Texas 32.753°, -100.644° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
April 17, 2023 brought a magnitude 2.5 earthquake 16 km NE of Hermleigh, Texas, logged at 22:12 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 21:36:31 UTC | 4.9mb | Kermadec Islands region -31.705°, -178.915° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake in the Kermadec Islands region at 21:36 UTC on April 17, 2023. Coming 2 hours after a magnitude 5.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 21:34:39 UTC | 4.5mb | Mid-Indian Ridge -14.970°, 66.563° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 17, 2023, worldwide seismic activity registered a magnitude 4.5 earthquake near Mid-Indian Ridge at 21:34 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 21:06:37 UTC | 4.3mb | 6 km SSE of Týrnavos, Greece 39.684°, 22.313° | 16.2 km | - | - | - | ✓ Reviewed | USGS → |
April 17, 2023 brought a magnitude 4.3 earthquake 6 km SSE of Týrnavos, Greece, logged at 21:06 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 20:55:01 UTC | 3.5ml | 57 km S of Whites City, New Mexico 31.657°, -104.361° | 6.7 km | 1 | III | - | ✓ Reviewed | USGS → |
At 20:55 UTC on April 17, 2023, a magnitude 3.5 tremor occurred 57 km S of Whites City, New Mexico. This event falls inside the aftershock decay of a nearby magnitude 3.7 earthquake that occurred about 3 hours earlier. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 20:47:22 UTC | 2.8ml | 55 km S of Whites City, New Mexico 31.678°, -104.371° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
At 20:47 UTC on April 17, 2023, a magnitude 2.8 tremor occurred 55 km S of Whites City, New Mexico. Coming 3 hours after a magnitude 3.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 20:32:54 UTC | 2.7ml | 193 km S of False Pass, Alaska 53.119°, -163.320° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.7 earthquake 193 km S of False Pass, Alaska with origin time 20:32 UTC on April 17, 2023. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 20:06:30 UTC | 4.9mb | 48 km SE of Ambunti, Papua New Guinea -4.464°, 143.176° | 89.5 km | 2 | - | - | ✓ Reviewed | USGS → |
This magnitude 4.9 event was detected 48 km SE of Ambunti, Papua New Guinea on April 17, 2023, with origin time 20:06 UTC. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 20:02:49 UTC | 3.1ml | south of Alaska 55.915°, -155.690° | 25.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.1 event was detected south of Alaska on April 17, 2023, with origin time 20:02 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:59:13 UTC | 4.7mb | Kermadec Islands region -31.690°, -179.132° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.7 earthquake in the Kermadec Islands region with origin time 19:59 UTC on April 17, 2023. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:57:21 UTC | 5.4mww | Kermadec Islands region -31.849°, -178.951° | 11.3 km | - | VI | green | ✓ Reviewed | USGS → |
On April 17, 2023 at 19:57 UTC, a magnitude 5.4 earthquake struck in the Kermadec Islands region. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on April 17, 2023. See the M5.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:51:48 UTC | 2.5md | 5km NE of Pinnacles, CA 36.561°, -121.105° | 9.2 km | 3 | - | - | ✓ Reviewed | USGS → |
On April 17, 2023 at 19:51 UTC, a magnitude 2.5 earthquake struck 5km NE of Pinnacles, CA. It arrived roughly 10 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 M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:51:04 UTC | 4.3mb | Santa Cruz Islands region -12.829°, 169.430° | 649.2 km | - | - | - | ✓ Reviewed | USGS → |
On April 17, 2023 at 19:51 UTC, a magnitude 4.3 earthquake struck in the Santa Cruz Islands region. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:49:37 UTC | 4.4mb | south of the Kermadec Islands -32.134°, -178.344° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded south of the Kermadec Islands on April 17, 2023 at 19:49 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:48:30 UTC | 2.8ml | 237 km S of False Pass, Alaska 52.728°, -163.073° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 237 km S of False Pass, Alaska at 19:48 UTC on April 17, 2023. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:40:59 UTC | 2.0md | 27km NNW of Laytonville, CA 39.926°, -123.565° | -0.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 27km NNW of Laytonville, CA on April 17, 2023, with origin time 19:40 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. | ||||||||
2023-04-17 2023-04-17 19:26:57 UTC | 2.7ml | 57 km S of Whites City, New Mexico 31.662°, -104.298° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
On April 17, 2023, worldwide seismic activity registered a magnitude 2.7 earthquake 57 km S of Whites City, New Mexico at 19:26 UTC. Coming 1 hours after a magnitude 3.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:15:01 UTC | 4.4mb | South Sandwich Islands region -58.138°, -23.601° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake in the South Sandwich Islands region with origin time 19:15 UTC on April 17, 2023. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:12:25 UTC | 4.9mb | New Britain region, Papua New Guinea -6.376°, 150.877° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.9 earthquake in the New Britain region, Papua New Guinea came in on April 17, 2023 at 19:12 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 19:10:34 UTC | 4.5mb | South Sandwich Islands region -56.918°, -24.074° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:10 UTC on April 17, 2023, a magnitude 4.5 tremor occurred in the South Sandwich Islands region. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-17 2023-04-17 18:52:36 UTC | 2.6ml | 4km SSW of Anza, CA 33.526°, -116.689° | 8.8 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 4km SSW of Anza, CA on April 17, 2023, with origin time 18:52 UTC. See the M2.6 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 17, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.