Earthquakes on September 18, 2026
252
EARTHQUAKES on September 18, 2026
24-hour UTC period · USGS data
LARGEST: M5.5 — Kermadec Islands region
94 km deep0
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
23
M3.0–3.9
14
M2.0–2.9
79
M1.0–1.9
132
Activity Summary
252
Total earthquakes
~250
Daily average
Normal
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.5
Kermadec Islands region
23:18 UTC · 94.1 km deep
05.2
28 km NE of Villa Presidente Frei, Chile
16:52 UTC · 100.0 km deep
Felt by 34
5.2
189 km SSW of Pelabuhanratu, Indonesia
14:36 UTC · 10.0 km deep
5.0
Izu Islands, Japan region
07:19 UTC · 35.3 km deep
4.8
5 km SW of Guánica, Puerto Rico
13:19 UTC · 7.0 km deep
Felt by 86
4.7
34 km NNE of Ruteng, Indonesia
12:20 UTC · 10.0 km deep
4.7
Fiji region
06:42 UTC · 548.4 km deep
4.7
40 km SSW of Sipí, Colombia
06:17 UTC · 68.4 km deep
Felt by 7
Earthquake Map — September 18, 2026
All Earthquakes — September 18, 2026
Showing 30 of 120 (filtered from 252)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2 days ago 2026-09-18 23:20:05 UTC | 2.3ml | 70 km WSW of Cantwell, Alaska 63.222°, -150.304° | 110.9 km | - | - | - | Auto | USGS → |
On September 18, 2026 at 23:20 UTC, a magnitude 2.3 earthquake struck 70 km WSW of Cantwell, Alaska. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 23:18:28 UTC | 5.5mww | Kermadec Islands region -27.858°, -177.229° | 94.1 km | - | - | green | ✓ Reviewed | USGS → |
On September 18, 2026 at 23:18 UTC, a magnitude 5.5 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 September 18, 2026. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 22:28:10 UTC | 2.6md | 4 km WSW of Guánica, Puerto Rico 17.958°, -66.951° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
At 22:28 UTC on September 18, 2026, a magnitude 2.6 tremor occurred 4 km WSW of Guánica, Puerto Rico. It arrived roughly 9 hours after a larger magnitude 4.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 22:15:41 UTC | 2.5md | 5 km SW of Guánica, Puerto Rico 17.945°, -66.948° | 6.9 km | - | - | - | ✓ Reviewed | USGS → |
At 22:15 UTC on September 18, 2026, a magnitude 2.5 tremor occurred 5 km SW of Guánica, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 9 hours earlier. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 22:11:57 UTC | 4.3mb | 15 km NNW of Mantoúdi, Greece 38.925°, 23.396° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded 15 km NNW of Mantoúdi, Greece on September 18, 2026 at 22:11 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 22:09:36 UTC | 3.9mb | 12 km NW of Corredor, Costa Rica 8.717°, -83.027° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.9 earthquake 12 km NW of Corredor, Costa Rica came in on September 18, 2026 at 22:09 UTC. The event was offshore. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 21:41:13 UTC | 2.3md | 3 km SW of Guánica, Puerto Rico 17.943°, -66.930° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
September 18, 2026 brought a magnitude 2.3 earthquake 3 km SW of Guánica, Puerto Rico, logged at 21:41 UTC. Coming 8 hours after a magnitude 4.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 21:30:38 UTC | 2.5ml | 11 km N of Fillmore, CA 34.502°, -118.912° | 26.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 11 km N of Fillmore, CA on September 18, 2026, with origin time 21:30 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 21:26:40 UTC | 3.7md | 30 km SSW of Boca de Yuma, Dominican Republic 18.113°, -68.702° | 128.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2026 at 21:26 UTC, a magnitude 3.7 earthquake struck 30 km SSW of Boca de Yuma, Dominican Republic. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 21:26:29 UTC | 2.1ml | 9 km SE of Foyil, Oklahoma 36.376°, -95.450° | 5.0 km | - | - | - | Auto | USGS → |
On September 18, 2026 at 21:26 UTC, a magnitude 2.1 earthquake struck 9 km SE of Foyil, Oklahoma. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 21:11:40 UTC | 2.4ml | 49 km ESE of Chignik, Alaska 56.186°, -157.624° | 52.3 km | - | - | - | Auto | USGS → |
A magnitude 2.4 seismic event took place 49 km ESE of Chignik, Alaska on September 18, 2026 at 21:11 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 20:34:10 UTC | 2.4ml | 50 km SSW of Cantwell, Alaska 62.951°, -149.206° | 75.1 km | - | - | - | Auto | USGS → |
September 18, 2026 brought a magnitude 2.4 earthquake 50 km SSW of Cantwell, Alaska, logged at 20:34 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 20:19:26 UTC | 2.1ml | 109 km E of Chignik, Alaska 56.161°, -156.650° | 5.0 km | - | - | - | Auto | USGS → |
This magnitude 2.1 event was detected 109 km E of Chignik, Alaska on September 18, 2026, with origin time 20:19 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 20:17:45 UTC | 2.3md | 4 km WSW of Fuig, Puerto Rico 17.973°, -66.960° | 6.8 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded 4 km WSW of Fuig, Puerto Rico on September 18, 2026 at 20:17 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 7 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 20:11:18 UTC | 2.4ml | 30 km N of Petersville, Alaska 62.771°, -150.699° | 87.2 km | - | - | - | Auto | USGS → |
On September 18, 2026 at 20:11 UTC, a magnitude 2.4 earthquake struck 30 km N of Petersville, Alaska. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 20:03:35 UTC | 2.0ml | 45 km WSW of Manley Hot Springs, Alaska 64.781°, -151.436° | 8.8 km | - | - | - | Auto | USGS → |
A magnitude 2.0 seismic event took place 45 km WSW of Manley Hot Springs, Alaska on September 18, 2026 at 20:03 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 20:02:24 UTC | 2.2md | 1 km WNW of Aguilita, Puerto Rico 18.029°, -66.551° | 20.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 1 km WNW of Aguilita, Puerto Rico at 20:02 UTC on September 18, 2026. Coming 13 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 19:47:20 UTC | 2.3md | 0 km SW of Indios, Puerto Rico 17.991°, -66.825° | 15.4 km | 1 | - | - | ✓ Reviewed | USGS → |
September 18, 2026 brought a magnitude 2.3 earthquake 0 km SW of Indios, Puerto Rico, logged at 19:47 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 6 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 19:40:02 UTC | 2.4md | 4 km WSW of Fuig, Puerto Rico 17.964°, -66.954° | 7.5 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2026, worldwide seismic activity registered a magnitude 2.4 earthquake 4 km WSW of Fuig, Puerto Rico at 19:40 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 6 hours earlier. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 19:28:33 UTC | 3.0md | 4 km WSW of Guánica, Puerto Rico 17.950°, -66.949° | 7.0 km | - | III | - | ✓ Reviewed | USGS → |
September 18, 2026 brought a magnitude 3.0 earthquake 4 km WSW of Guánica, Puerto Rico, logged at 19:28 UTC. It arrived roughly 6 hours after a larger magnitude 4.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 19:24:48 UTC | 2.7md | 4 km WSW of Fuig, Puerto Rico 17.976°, -66.954° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.7 event was detected 4 km WSW of Fuig, Puerto Rico on September 18, 2026, with origin time 19:24 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 6 hours earlier. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 19:16:37 UTC | 4.5mb | 112 km ESE of Ust’-Kamchatsk Staryy, Russia 55.750°, 164.062° | 30.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2026, worldwide seismic activity registered a magnitude 4.5 earthquake 112 km ESE of Ust’-Kamchatsk Staryy, Russia at 19:16 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 19:14:55 UTC | 2.1md | 6 km SW of Guánica, Puerto Rico 17.937°, -66.961° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
September 18, 2026 brought a magnitude 2.1 earthquake 6 km SW of Guánica, Puerto Rico, logged at 19:14 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 6 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 19:13:17 UTC | 2.6ml | 28 km E of Honaunau-Napoopoo, Hawaii 19.465°, -155.590° | 26.8 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 28 km E of Honaunau-Napoopoo, Hawaii with origin time 19:13 UTC on September 18, 2026. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 18:58:38 UTC | 2.0md | 7 km SSE of La Parguera, Puerto Rico 17.910°, -67.032° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 7 km SSE of La Parguera, Puerto Rico on September 18, 2026, with origin time 18:58 UTC. Coming 6 hours after a magnitude 4.8 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. | ||||||||
2 days ago 2026-09-18 18:42:57 UTC | 2.2md | 6 km SW of Guánica, Puerto Rico 17.939°, -66.956° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 6 km SW of Guánica, Puerto Rico on September 18, 2026 at 18:42 UTC. Coming 5 hours after a magnitude 4.8 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. | ||||||||
2 days ago 2026-09-18 18:41:22 UTC | 4.5mb | 23 km SW of Sipí, Colombia 4.504°, -76.798° | 72.6 km | - | - | - | ✓ Reviewed | USGS → |
At 18:41 UTC on September 18, 2026, a magnitude 4.5 tremor occurred 23 km SW of Sipí, Colombia. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 18:39:41 UTC | 2.2md | 4 km SSW of Guánica, Puerto Rico 17.940°, -66.929° | 7.5 km | - | - | - | ✓ Reviewed | USGS → |
At 18:39 UTC on September 18, 2026, a magnitude 2.2 tremor occurred 4 km SSW of Guánica, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 5 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 18:33:46 UTC | 2.7md | 25 km ENE of Yacolt, Washington 45.949°, -122.099° | 9.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 25 km ENE of Yacolt, Washington on September 18, 2026 at 18:33 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-09-18 18:24:23 UTC | 2.5md | 5 km SSW of Guánica, Puerto Rico 17.928°, -66.927° | 5.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 5 km SSW of Guánica, Puerto Rico came in on September 18, 2026 at 18:24 UTC. It arrived roughly 5 hours after a larger magnitude 4.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.5 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 September 18, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.