Earthquakes on July 11, 2021
417
EARTHQUAKES on July 11, 2021
24-hour UTC period · USGS data
10 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
27
M3.0–3.9
17
M2.0–2.9
107
M1.0–1.9
262
Activity Summary
417
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Geographic Breakdown
Top Countries (International)
Significant Earthquakes (M4.5+)
5.4
282 km ESE of Attu Station, Alaska
02:11 UTC · 10.0 km deep
5.4
Rat Islands, Aleutian Islands, Alaska
02:11 UTC · 1.1 km deep
5.1
288 km ESE of Attu Station, Alaska
00:08 UTC · 7.7 km deep
5.0
49 km ESE of Adak, Alaska
17:04 UTC · 58.4 km deep
Felt by 3
4.9
South Sandwich Islands region
02:03 UTC · 10.0 km deep
4.7
Kuril Islands
21:07 UTC · 72.9 km deep
4.7
7 km ENE of Chivay, Peru
14:46 UTC · 125.8 km deep
4.7
53 km ENE of Hihifo, Tonga
10:24 UTC · 35.0 km deep
Earthquake Map — July 11, 2021
All Earthquakes — July 11, 2021
Showing 30 of 155 (filtered from 417)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-07-11 2021-07-11 23:54:39 UTC | 2.1md | 29km ENE of Dardanelle, CA 38.474°, -119.543° | 4.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 29km ENE of Dardanelle, CA on July 11, 2021 at 23:54 UTC. It arrived roughly 11 hours after a larger magnitude 3.3 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. | ||||||||
2021-07-11 2021-07-11 23:53:25 UTC | 2.9md | 5 km WSW of Fuig, Puerto Rico 17.966°, -66.960° | 11.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 5 km WSW of Fuig, Puerto Rico with origin time 23:53 UTC on July 11, 2021. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 23:12:58 UTC | 4.2mb | 45 km SSE of Taltal, Chile -25.779°, -70.290° | 56.3 km | 1 | - | - | ✓ Reviewed | USGS → |
On July 11, 2021, worldwide seismic activity registered a magnitude 4.2 earthquake 45 km SSE of Taltal, Chile at 23:12 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 22:43:47 UTC | 2.8ml | 15km ENE of Ridgecrest, CA 35.676°, -117.530° | 9.3 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 15km ENE of Ridgecrest, CA at 22:43 UTC on July 11, 2021. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 22:39:12 UTC | 2.3ml | 16 km SSW of Radersburg, Montana 46.068°, -111.738° | 4.2 km | - | - | - | ✓ Reviewed | USGS → |
At 22:39 UTC on July 11, 2021, a magnitude 2.3 tremor occurred 16 km SSW of Radersburg, Montana. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 22:27:41 UTC | 2.6md | 3 km SE of La Parguera, Puerto Rico 17.950°, -67.021° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 11, 2021, worldwide seismic activity registered a magnitude 2.6 earthquake 3 km SE of La Parguera, Puerto Rico at 22:27 UTC. It arrived roughly 18 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 M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 22:24:25 UTC | 2.6ml | 53 km ESE of Adak, Alaska 51.701°, -175.907° | 43.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 53 km ESE of Adak, Alaska at 22:24 UTC on July 11, 2021. Coming 5 hours after a magnitude 5.0 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. | ||||||||
2021-07-11 2021-07-11 22:14:04 UTC | 2.3md | 34km NW of Bridgeport, CA 38.484°, -119.487° | 9.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 34km NW of Bridgeport, CA on July 11, 2021, with origin time 22:14 UTC. It arrived roughly 10 hours after a larger magnitude 3.3 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. | ||||||||
2021-07-11 2021-07-11 22:09:58 UTC | 4.6mb | Kermadec Islands, New Zealand -30.099°, -178.107° | 131.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place near Kermadec Islands, New Zealand on July 11, 2021 at 22:09 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 22:06:15 UTC | 2.3md | 29km ESE of Markleeville, CA 38.544°, -119.516° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 29km ESE of Markleeville, CA at 22:06 UTC on July 11, 2021. It arrived roughly 10 hours after a larger magnitude 3.3 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. | ||||||||
2021-07-11 2021-07-11 22:05:17 UTC | 2.5md | 32km ENE of Dardanelle, CA 38.472°, -119.506° | 5.8 km | - | - | - | ✓ Reviewed | USGS → |
On July 11, 2021 at 22:05 UTC, a magnitude 2.5 earthquake struck 32km ENE of Dardanelle, CA. This event falls inside the aftershock decay of a nearby magnitude 3.3 earthquake that occurred about 9 hours earlier. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 21:57:36 UTC | 2.5ml | 54 km NW of Toyah, Texas 31.647°, -104.222° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 54 km NW of Toyah, Texas on July 11, 2021 at 21:57 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 21:52:21 UTC | 2.5md | 31km ENE of Dardanelle, CA 38.497°, -119.533° | 5.4 km | - | - | - | ✓ Reviewed | USGS → |
July 11, 2021 brought a magnitude 2.5 earthquake 31km ENE of Dardanelle, CA, logged at 21:52 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.3 earthquake that occurred about 9 hours earlier. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 21:42:10 UTC | 4.1mb | Fiji region -19.935°, -178.238° | 611.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected in the Fiji region on July 11, 2021, with origin time 21:42 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 21:38:00 UTC | 4.6mb | southeast of the Loyalty Islands -21.477°, 172.251° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
July 11, 2021 brought a magnitude 4.6 earthquake southeast of the Loyalty Islands, logged at 21:38 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 21:07:22 UTC | 4.7mb | Kuril Islands 46.565°, 151.674° | 72.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake near Kuril Islands at 21:07 UTC on July 11, 2021. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 21:02:04 UTC | 2.4md | 29km SE of Markleeville, CA 38.530°, -119.530° | 2.4 km | - | - | - | ✓ Reviewed | USGS → |
On July 11, 2021, worldwide seismic activity registered a magnitude 2.4 earthquake 29km SE of Markleeville, CA at 21:02 UTC. It arrived roughly 8 hours after a larger magnitude 3.3 mainshock in the same 20 km area, placing it within the typical aftershock window. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 20:55:21 UTC | 2.0ml | 9 km S of Fern Forest, Hawaii 19.382°, -155.121° | 2.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 9 km S of Fern Forest, Hawaii with origin time 20:55 UTC on July 11, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 6 hours earlier. 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. | ||||||||
2021-07-11 2021-07-11 20:51:23 UTC | 2.2ml | 54 km NW of Toyah, Texas 31.646°, -104.211° | 7.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 54 km NW of Toyah, Texas on July 11, 2021 at 20:51 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 20:47:08 UTC | 2.0md | 2 km WSW of Alcoa, Tennessee 35.778°, -84.002° | 21.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 2 km WSW of Alcoa, Tennessee at 20:47 UTC on July 11, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.3 earthquake that occurred about 1 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 20:45:39 UTC | 2.1ml | 30 km SW of Cantwell, Alaska 63.193°, -149.378° | 82.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 30 km SW of Cantwell, Alaska on July 11, 2021, with origin time 20:45 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 20:37:17 UTC | 4.0ml | 16 km WSW of Trapper Creek, Alaska 62.243°, -150.514° | 22.0 km | 153 | IV | green | ✓ Reviewed | USGS → |
On July 11, 2021 at 20:37 UTC, a magnitude 4.0 earthquake struck 16 km WSW of Trapper Creek, Alaska. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 20:24:47 UTC | 3.2ml | 26 km S of Ugashik, Alaska 57.279°, -157.410° | 121.5 km | 1 | - | - | ✓ Reviewed | USGS → |
July 11, 2021 brought a magnitude 3.2 earthquake 26 km S of Ugashik, Alaska, logged at 20:24 UTC. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 20:21:58 UTC | 2.3md | 3 km SW of Alcoa, Tennessee 35.771°, -84.004° | 21.6 km | - | - | - | ✓ Reviewed | USGS → |
On July 11, 2021, worldwide seismic activity registered a magnitude 2.3 earthquake 3 km SW of Alcoa, Tennessee at 20:21 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 20:03:40 UTC | 2.3ml | 287 km ESE of Attu Station, Alaska 52.070°, 177.217° | 6.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 287 km ESE of Attu Station, Alaska on July 11, 2021 at 20:03 UTC. Coming 18 hours after a magnitude 5.4 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. | ||||||||
2021-07-11 2021-07-11 19:37:34 UTC | 2.2ml | 28 km NW of Stanley, Idaho 44.380°, -115.218° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 28 km NW of Stanley, Idaho on July 11, 2021 at 19:37 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. | ||||||||
2021-07-11 2021-07-11 19:14:16 UTC | 2.2md | 28km SE of Markleeville, CA 38.544°, -119.529° | 4.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 28km SE of Markleeville, CA on July 11, 2021, with origin time 19:14 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.3 earthquake that occurred about 7 hours earlier. 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. | ||||||||
2021-07-11 2021-07-11 19:06:54 UTC | 3.0md | 28km SE of Markleeville, CA 38.542°, -119.528° | 4.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 seismic event took place 28km SE of Markleeville, CA on July 11, 2021 at 19:06 UTC. It arrived roughly 7 hours after a larger magnitude 3.3 mainshock in the same 20 km area, placing it within the typical aftershock window. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-11 2021-07-11 18:56:29 UTC | 2.5md | 32km NW of Bridgeport, CA 38.467°, -119.476° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 32km NW of Bridgeport, CA on July 11, 2021 at 18:56 UTC. It arrived roughly 6 hours after a larger magnitude 3.3 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. | ||||||||
2021-07-11 2021-07-11 18:52:04 UTC | 2.3md | 32km SE of Markleeville, CA 38.502°, -119.524° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 32km SE of Markleeville, CA came in on July 11, 2021 at 18:52 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.3 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. | ||||||||
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 July 11, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.