Earthquakes on September 18, 2026
415
EARTHQUAKES on September 18, 2026
24-hour UTC period · USGS data
LARGEST: M5.3 — Kermadec Islands region
94 km deep0
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
30
M3.0–3.9
19
M2.0–2.9
112
M1.0–1.9
251
Activity Summary
415
Total earthquakes
~250
Daily average
Elevated
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.3
Kermadec Islands region
23:18 UTC · 94.1 km deep
05.2
182 km SSW of Pelabuhanratu, Indonesia
14:36 UTC · 10.0 km deep
5.0
Izu Islands, Japan region
07:19 UTC · 38.9 km deep
4.8
28 km ENE of Villa Presidente Frei, Chile
16:52 UTC · 100.1 km deep
Felt by 34
4.8
5 km SW of Guánica, Puerto Rico
13:19 UTC · 7.0 km deep
Felt by 86
4.7
South Pacific Ocean
23:51 UTC · 10.0 km deep
4.7
43 km NNE of Ruteng, Indonesia
12:20 UTC · 10.0 km deep
4.7
Fiji region
06:42 UTC · 548.4 km deep
Earthquake Map — September 18, 2026
All Earthquakes — September 18, 2026
Showing 30 of 164 (filtered from 415)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-09-18 2026-09-18 23:51:06 UTC | 4.7mb | South Pacific Ocean -7.454°, -132.129° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake near South Pacific Ocean at 23:51 UTC on September 18, 2026. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 23:30:17 UTC | 2.6ml | 128 km E of McCarthy, Alaska 61.483°, -140.518° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:30 UTC on September 18, 2026, a magnitude 2.6 tremor occurred 128 km E of McCarthy, Alaska. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 23:20:05 UTC | 2.3ml | 69 km WSW of Cantwell, Alaska 63.224°, -150.287° | 110.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 69 km WSW of Cantwell, Alaska on September 18, 2026, with origin time 23:20 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 23:18:28 UTC | 5.3mww | Kermadec Islands region -27.816°, -177.301° | 94.1 km | - | - | green | ✓ Reviewed | USGS → |
On September 18, 2026 at 23:18 UTC, a magnitude 5.3 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 M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 23:07:19 UTC | 3.0ml | 166 km WSW of Nikolski, Alaska 52.438°, -171.181° | 99.7 km | - | - | - | ✓ Reviewed | USGS → |
September 18, 2026 brought a magnitude 3.0 earthquake 166 km WSW of Nikolski, Alaska, logged at 23:07 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 22:57:48 UTC | 2.0md | 4 km WSW of Guánica, Puerto Rico 17.961°, -66.945° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 4 km WSW of Guánica, Puerto Rico on September 18, 2026 at 22:57 UTC. Coming 10 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. | ||||||||
2026-09-18 2026-09-18 22:41:35 UTC | 2.1md | 5 km WSW of Guánica, Puerto Rico 17.954°, -66.961° | 7.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 5 km WSW of Guánica, Puerto Rico on September 18, 2026, with origin time 22:41 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 9 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 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 → |
A magnitude 2.6 earthquake was recorded 4 km WSW of Guánica, Puerto Rico on September 18, 2026 at 22:28 UTC. Coming 9 hours after a magnitude 4.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 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 → |
A magnitude 2.5 seismic event took place 5 km SW of Guánica, Puerto Rico on September 18, 2026 at 22:15 UTC. 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. | ||||||||
2026-09-18 2026-09-18 22:11:57 UTC | 4.3mb | 17 km E of Istiaía, Greece 38.958°, 23.359° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:11 UTC on September 18, 2026, a magnitude 4.3 tremor occurred 17 km E of Istiaía, Greece. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 22:09:36 UTC | 3.9mb | 8 km W of Cañas Gordas, Panama 8.741°, -82.993° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
On September 18, 2026, worldwide seismic activity registered a magnitude 3.9 earthquake 8 km W of Cañas Gordas, Panama at 22:09 UTC. The event was offshore. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 21:41:14 UTC | 2.5md | 3 km SW of Guánica, Puerto Rico 17.949°, -66.926° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2026, worldwide seismic activity registered a magnitude 2.5 earthquake 3 km SW of Guánica, Puerto Rico at 21:41 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 8 hours earlier. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 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 → |
Reports of a magnitude 2.3 earthquake 3 km SW of Guánica, Puerto Rico came in on September 18, 2026 at 21:41 UTC. It arrived roughly 8 hours after a larger magnitude 4.8 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 21:30:38 UTC | 2.5ml | 11 km N of Fillmore, CA 34.502°, -118.912° | 26.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 11 km N of Fillmore, CA at 21:30 UTC on September 18, 2026. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 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 → |
This magnitude 3.7 event was detected 30 km SSW of Boca de Yuma, Dominican Republic on September 18, 2026, with origin time 21:26 UTC. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 21:15:13 UTC | 4.5mb | 27 km E of Ōarai, Japan 36.306°, 140.889° | 45.4 km | - | - | - | ✓ Reviewed | USGS → |
At 21:15 UTC on September 18, 2026, a magnitude 4.5 tremor occurred 27 km E of Ōarai, Japan. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 21:11:47 UTC | 2.5ml | 80 km WSW of Atka, Alaska 51.864°, -175.240° | 36.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 80 km WSW of Atka, Alaska on September 18, 2026 at 21:11 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 21:11:40 UTC | 2.5ml | 49 km ESE of Chignik, Alaska 56.188°, -157.621° | 51.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake 49 km ESE of Chignik, Alaska with origin time 21:11 UTC on September 18, 2026. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 21:09:54 UTC | 2.3ml | 92 km SE of Akutan, Alaska 53.493°, -164.872° | 27.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 92 km SE of Akutan, Alaska came in on September 18, 2026 at 21:09 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 20:34:10 UTC | 2.3ml | 50 km SSW of Cantwell, Alaska 62.955°, -149.204° | 74.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 50 km SSW of Cantwell, Alaska on September 18, 2026 at 20:34 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 20:19:26 UTC | 2.1ml | 109 km E of Chignik, Alaska 56.169°, -156.659° | 0.6 km | - | - | - | ✓ Reviewed | USGS → |
At 20:19 UTC on September 18, 2026, a magnitude 2.1 tremor occurred 109 km E of Chignik, Alaska. 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. | ||||||||
2026-09-18 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 → |
September 18, 2026 brought a magnitude 2.3 earthquake 4 km WSW of Fuig, Puerto Rico, logged at 20:17 UTC. Coming 7 hours after a magnitude 4.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 20:11:18 UTC | 2.4ml | 30 km N of Petersville, Alaska 62.765°, -150.687° | 88.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 30 km N of Petersville, Alaska with origin time 20:11 UTC on September 18, 2026. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 20:09:58 UTC | 2.4ml | 72 km ESE of Nikolski, Alaska 52.694°, -167.860° | 37.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 18, 2026, worldwide seismic activity registered a magnitude 2.4 earthquake 72 km ESE of Nikolski, Alaska at 20:09 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 20:03:35 UTC | 2.0ml | 44 km WSW of Manley Hot Springs, Alaska 64.782°, -151.430° | 9.4 km | - | - | - | ✓ Reviewed | USGS → |
September 18, 2026 brought a magnitude 2.0 earthquake 44 km WSW of Manley Hot Springs, Alaska, logged at 20:03 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 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 → |
At 20:02 UTC on September 18, 2026, a magnitude 2.2 tremor occurred 1 km WNW of Aguilita, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 13 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 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 → |
The USGS recorded this magnitude 2.3 earthquake 0 km SW of Indios, Puerto Rico at 19:47 UTC on September 18, 2026. 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. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 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 → |
September 18, 2026 brought a magnitude 2.4 earthquake 4 km WSW of Fuig, Puerto Rico, logged at 19:40 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 M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 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 → |
A magnitude 3.0 seismic event took place 4 km WSW of Guánica, Puerto Rico on September 18, 2026 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. | ||||||||
2026-09-18 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 → |
September 18, 2026 brought a magnitude 2.7 earthquake 4 km WSW of Fuig, Puerto Rico, logged at 19:24 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 M2.7 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 September 18, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.