Earthquakes on April 18, 2023
242
EARTHQUAKES on April 18, 2023
24-hour UTC period · USGS data
LARGEST: M6.7 — south of the Fiji Islands
580 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
29
M3.0–3.9
10
M2.0–2.9
56
M1.0–1.9
144
Activity Summary
242
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
South Sandwich Islands
1
Northern Mariana Islands
1
Significant Earthquakes (M4.5+)
6.7
south of the Fiji Islands
04:31 UTC · 580.0 km deep
5.6
100 km SE of Mil’kovo, Russia
02:40 UTC · 108.0 km deep
Felt by 1
5.0
Kermadec Islands region
01:10 UTC · 10.0 km deep
4.9
Kermadec Islands region
20:07 UTC · 10.0 km deep
4.9
108 km NW of Gizo, Solomon Islands
16:51 UTC · 70.9 km deep
4.9
115 km SW of Port-Vila, Vanuatu
10:09 UTC · 10.0 km deep
4.9
Kermadec Islands region
01:09 UTC · 10.0 km deep
4.7
Kermadec Islands region
01:09 UTC · 10.0 km deep
Earthquake Map — April 18, 2023
All Earthquakes — April 18, 2023
Showing 30 of 98 (filtered from 242)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-04-18 2023-04-18 23:59:31 UTC | 4.3mb | South Sandwich Islands region -56.023°, -27.102° | 108.7 km | - | - | - | ✓ Reviewed | USGS → |
April 18, 2023 brought a magnitude 4.3 earthquake in the South Sandwich Islands region, logged at 23:59 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 23:51:19 UTC | 2.4md | 3 km SSW of Guánica, Puerto Rico 17.943°, -66.927° | 13.4 km | - | - | - | ✓ Reviewed | USGS → |
April 18, 2023 brought a magnitude 2.4 earthquake 3 km SSW of Guánica, Puerto Rico, logged at 23:51 UTC. Coming 22 hours after a magnitude 2.8 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. | ||||||||
2023-04-18 2023-04-18 23:50:36 UTC | 2.8mb_lg | 7 km N of Segundo, Colorado 37.191°, -104.744° | 6.8 km | 2 | - | - | ✓ Reviewed | USGS → |
On April 18, 2023, worldwide seismic activity registered a magnitude 2.8 earthquake 7 km N of Segundo, Colorado at 23:50 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 22:46:13 UTC | 2.6ml | 59 km S of Adak, Alaska 51.344°, -176.724° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 seismic event took place 59 km S of Adak, Alaska on April 18, 2023 at 22:46 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 22:39:31 UTC | 4.5mb | 47 km W of Bengkulu, Indonesia -3.772°, 101.835° | 61.6 km | - | - | - | ✓ Reviewed | USGS → |
April 18, 2023 brought a magnitude 4.5 earthquake 47 km W of Bengkulu, Indonesia, logged at 22:39 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 22:36:28 UTC | 2.0ml | 78 km ESE of Sand Point, Alaska 55.074°, -159.350° | 13.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 78 km ESE of Sand Point, Alaska with origin time 22:36 UTC on April 18, 2023. Coming 14 hours after a magnitude 2.1 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. | ||||||||
2023-04-18 2023-04-18 22:15:59 UTC | 2.5mb_lg | 21 km WSW of Carlsbad, New Mexico 32.374°, -104.450° | 5.0 km | 2 | - | - | ✓ Reviewed | USGS → |
On April 18, 2023, worldwide seismic activity registered a magnitude 2.5 earthquake 21 km WSW of Carlsbad, New Mexico at 22:15 UTC. Coming 2 hours after a magnitude 3.4 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. | ||||||||
2023-04-18 2023-04-18 22:01:37 UTC | 3.1ml | 60 km SE of Denali National Park, Alaska 63.195°, -150.796° | 126.6 km | - | - | - | ✓ Reviewed | USGS → |
April 18, 2023 brought a magnitude 3.1 earthquake 60 km SE of Denali National Park, Alaska, logged at 22:01 UTC. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 21:41:05 UTC | 2.2ml | 56 km S of Whites City, New Mexico 31.664°, -104.328° | 7.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 56 km S of Whites City, New Mexico on April 18, 2023 at 21:41 UTC. Coming 20 hours after a magnitude 2.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 21:27:56 UTC | 2.5md | 4km SW of Humboldt Hill, CA 40.700°, -124.218° | 17.8 km | 4 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake 4km SW of Humboldt Hill, CA with origin time 21:27 UTC on April 18, 2023. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 21:09:27 UTC | 2.0ml | 105 km S of False Pass, Alaska 53.912°, -163.529° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
On April 18, 2023, worldwide seismic activity registered a magnitude 2.0 earthquake 105 km S of False Pass, Alaska at 21:09 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 20:45:40 UTC | 2.2ml | 46 km NW of Ninilchik, Alaska 60.287°, -152.351° | 89.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 46 km NW of Ninilchik, Alaska with origin time 20:45 UTC on April 18, 2023. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 20:38:42 UTC | 2.0ml | 55 km NNE of Kobuk, Alaska 67.340°, -156.225° | 8.1 km | - | - | - | ✓ Reviewed | USGS → |
At 20:38 UTC on April 18, 2023, a magnitude 2.0 tremor occurred 55 km NNE of Kobuk, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 20:37:36 UTC | 4.2mb | 152 km SSW of Ambon, Indonesia -5.033°, 127.856° | 340.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 152 km SSW of Ambon, Indonesia with origin time 20:37 UTC on April 18, 2023. 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. | ||||||||
2023-04-18 2023-04-18 20:36:10 UTC | 3.2ml | 81 km WSW of Kivalina, Alaska 67.533°, -166.397° | 8.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.2 earthquake 81 km WSW of Kivalina, Alaska at 20:36 UTC on April 18, 2023. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 20:31:35 UTC | 3.4ml | 23 km W of Carlsbad, New Mexico 32.391°, -104.479° | 5.0 km | 5 | IV | - | ✓ Reviewed | USGS → |
On April 18, 2023, worldwide seismic activity registered a magnitude 3.4 earthquake 23 km W of Carlsbad, New Mexico at 20:31 UTC. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 20:07:51 UTC | 4.9mb | Kermadec Islands region -31.736°, -178.717° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 18, 2023, worldwide seismic activity registered a magnitude 4.9 earthquake in the Kermadec Islands region at 20:07 UTC. It arrived roughly 19 hours after a larger magnitude 5.0 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. | ||||||||
2023-04-18 2023-04-18 20:07:10 UTC | 4.5mb | Kermadec Islands region -31.865°, -178.869° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 18, 2023 at 20:07 UTC, a magnitude 4.5 earthquake struck in the Kermadec Islands region. This event falls inside the aftershock decay of a nearby magnitude 5.0 earthquake that occurred about 19 hours earlier. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 19:55:38 UTC | 2.4md | 0 km NNE of Palmarejo, Puerto Rico 18.046°, -67.075° | 13.7 km | - | - | - | ✓ Reviewed | USGS → |
At 19:55 UTC on April 18, 2023, a magnitude 2.4 tremor occurred 0 km NNE of Palmarejo, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 18 hours earlier. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 19:53:13 UTC | 2.4md | 41 km ESE of Naalehu, Hawaii 18.875°, -155.245° | 10.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.4 earthquake 41 km ESE of Naalehu, Hawaii at 19:53 UTC on April 18, 2023. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 19:44:37 UTC | 2.0md | 6 km WNW of Maricao, Puerto Rico 18.197°, -67.040° | 18.1 km | - | - | - | ✓ Reviewed | USGS → |
On April 18, 2023 at 19:44 UTC, a magnitude 2.0 earthquake struck 6 km WNW of Maricao, Puerto Rico. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 19:26:04 UTC | 2.2ml | 129 km SSE of Sand Point, Alaska 54.236°, -159.860° | 15.3 km | - | - | - | ✓ Reviewed | USGS → |
On April 18, 2023, worldwide seismic activity registered a magnitude 2.2 earthquake 129 km SSE of Sand Point, Alaska at 19:26 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 19:05:24 UTC | 4.4mb | 171 km N of Tobelo, Indonesia 3.255°, 128.274° | 39.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 171 km N of Tobelo, Indonesia on April 18, 2023, with origin time 19:05 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 19:05:04 UTC | 3.2ml | 21 km ENE of Nikolski, Alaska 53.018°, -168.574° | 77.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.2 event was detected 21 km ENE of Nikolski, Alaska on April 18, 2023, with origin time 19:05 UTC. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 18:56:36 UTC | 4.5mb | east of the North Island of New Zealand -35.392°, -179.229° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded east of the North Island of New Zealand on April 18, 2023 at 18:56 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 18:51:21 UTC | 4.2mb | 15 km SW of Piedecuesta, Colombia 6.878°, -73.133° | 152.1 km | - | - | - | ✓ Reviewed | USGS → |
On April 18, 2023, worldwide seismic activity registered a magnitude 4.2 earthquake 15 km SW of Piedecuesta, Colombia at 18:51 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 18:37:36 UTC | 2.1ml | 25 km ESE of Skwentna, Alaska 61.876°, -150.984° | 72.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 25 km ESE of Skwentna, Alaska on April 18, 2023 at 18:37 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 17:43:04 UTC | 3.2ml | 4 km SSW of Colstrip, Montana 45.848°, -106.648° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.2 earthquake 4 km SSW of Colstrip, Montana came in on April 18, 2023 at 17:43 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-18 2023-04-18 17:23:53 UTC | 2.9md | 11km S of Tres Pinos, CA 36.688°, -121.326° | 4.1 km | 7 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 11km S of Tres Pinos, CA with origin time 17:23 UTC on April 18, 2023. 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. | ||||||||
2023-04-18 2023-04-18 17:11:12 UTC | 4.4mb | Chagos Archipelago region -3.761°, 68.243° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake in the Chagos Archipelago region came in on April 18, 2023 at 17:11 UTC. See the M4.4 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 18, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.