Earthquakes on July 23, 2021
312
EARTHQUAKES on July 23, 2021
24-hour UTC period · USGS data
LARGEST: M6.7 — 15 km S of Hukay, Philippines
110 km deep · 317 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
26
M3.0–3.9
8
M2.0–2.9
75
M1.0–1.9
197
Activity Summary
312
Total earthquakes
~250
Daily average
Elevated
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.7
15 km S of Hukay, Philippines
20:48 UTC · 110.0 km deep
Felt by 317
5.8
6 km SE of Hukay, Philippines
20:57 UTC · 120.6 km deep
Felt by 31
5.5
south of Tonga
23:13 UTC · 10.0 km deep
Felt by 1
5.5
91 km ESE of Kokopo, Papua New Guinea
06:16 UTC · 56.7 km deep
5.5
Greenland Sea
04:05 UTC · 10.0 km deep
Felt by 1
5.0
southern Mid-Atlantic Ridge
19:24 UTC · 10.0 km deep
4.9
Mid-Indian Ridge
21:17 UTC · 10.0 km deep
4.8
11 km NW of Harding-Birch Lakes, Alaska
04:20 UTC · 9.8 km deep
Felt by 380
Earthquake Map — July 23, 2021
All Earthquakes — July 23, 2021
Showing 30 of 115 (filtered from 312)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-07-23 2021-07-23 23:57:38 UTC | 2.2ml | 22 km ESE of Denali National Park, Alaska 63.435°, -151.342° | 13.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 22 km ESE of Denali National Park, Alaska on July 23, 2021 at 23:57 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 23:13:52 UTC | 5.5mww | south of Tonga -26.634°, -175.666° | 10.0 km | 1 | - | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.5 earthquake south of Tonga with origin time 23:13 UTC on July 23, 2021. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 23:02:56 UTC | 2.2ml | 121 km SSE of Sand Point, Alaska 54.333°, -159.755° | 23.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 121 km SSE of Sand Point, Alaska with origin time 23:02 UTC on July 23, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 1 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 22:52:27 UTC | 4.4mb | 38 km WSW of Diamante, Italy 39.519°, 15.431° | 263.3 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 38 km WSW of Diamante, Italy on July 23, 2021, with origin time 22:52 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 22:51:56 UTC | 2.4ml | 113 km SSE of Sand Point, Alaska 54.369°, -159.927° | 17.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.4 earthquake 113 km SSE of Sand Point, Alaska at 22:51 UTC on July 23, 2021. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 22:37:23 UTC | 4.3mb | 52 km N of Pangai, Tonga -19.340°, -174.395° | 49.9 km | - | - | - | ✓ Reviewed | USGS → |
On July 23, 2021, worldwide seismic activity registered a magnitude 4.3 earthquake 52 km N of Pangai, Tonga at 22:37 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 22:23:40 UTC | 2.1ml | 2 km SE of P?hala, Hawaii 19.188°, -155.466° | 33.7 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.1 earthquake 2 km SE of P?hala, Hawaii with origin time 22:23 UTC on July 23, 2021. Coming 21 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 22:13:56 UTC | 4.2mb | 20 km SSW of Puerto El Triunfo, El Salvador 13.109°, -88.626° | 87.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 seismic event took place 20 km SSW of Puerto El Triunfo, El Salvador on July 23, 2021 at 22:13 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 22:13:53 UTC | 2.3ml | 126 km SSE of Sand Point, Alaska 54.261°, -159.867° | 19.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 126 km SSE of Sand Point, Alaska with origin time 22:13 UTC on July 23, 2021. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 22:12:38 UTC | 2.1ml | 18km N of Fillmore, CA 34.564°, -118.922° | 6.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 18km N of Fillmore, CA on July 23, 2021, with origin time 22:12 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 22:01:25 UTC | 3.0md | 3 km SSE of Lamboglia, Puerto Rico 17.953°, -65.969° | 32.0 km | 1 | - | - | ✓ Reviewed | USGS → |
July 23, 2021 brought a magnitude 3.0 earthquake 3 km SSE of Lamboglia, Puerto Rico, logged at 22:01 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 21:55:49 UTC | 4.4mb | Izu Islands, Japan region 31.758°, 139.625° | 151.7 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake in the Izu Islands, Japan region came in on July 23, 2021 at 21:55 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 21:32:12 UTC | 2.8md | 2 km W of Mehama, Oregon 44.791°, -122.656° | -0.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 2 km W of Mehama, Oregon at 21:32 UTC on July 23, 2021. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 21:17:20 UTC | 4.9mb | Mid-Indian Ridge -39.760°, 80.373° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.9 event was detected near Mid-Indian Ridge on July 23, 2021, with origin time 21:17 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 21:04:06 UTC | 4.2mb | 5 km ESE of Puro, Philippines 12.470°, 123.430° | 285.3 km | - | - | - | ✓ Reviewed | USGS → |
July 23, 2021 brought a magnitude 4.2 earthquake 5 km ESE of Puro, Philippines, logged at 21:04 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 20:59:36 UTC | 2.2ml | 12 km NW of Tilden, Texas 28.531°, -98.650° | 3.8 km | - | - | - | ✓ Reviewed | USGS → |
On July 23, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 12 km NW of Tilden, Texas at 20:59 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. | ||||||||
2021-07-23 2021-07-23 20:57:18 UTC | 5.8mww | 6 km SE of Hukay, Philippines 13.798°, 120.743° | 120.6 km | 31 | III | green | ✓ Reviewed | USGS → |
A magnitude 5.8 earthquake was recorded 6 km SE of Hukay, Philippines on July 23, 2021 at 20:57 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.7 earthquake that occurred about 1 hours earlier. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 20:48:57 UTC | 6.7mww | 15 km S of Hukay, Philippines 13.705°, 120.726° | 110.0 km | 317 | V | green | ✓ Reviewed | USGS → |
On July 23, 2021 at 20:48 UTC, a magnitude 6.7 earthquake struck 15 km S of Hukay, Philippines. A tsunami evaluation was automatically initiated given the magnitude and location. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M6.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 20:39:29 UTC | 2.4ml | 58 km S of Whites City, New Mexico 31.653°, -104.311° | 6.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 58 km S of Whites City, New Mexico on July 23, 2021, with origin time 20:39 UTC. It arrived roughly 17 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 M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 20:12:53 UTC | 4.3mb | 32 km S of Jurm, Afghanistan 36.576°, 70.856° | 207.2 km | - | - | - | ✓ Reviewed | USGS → |
At 20:12 UTC on July 23, 2021, a magnitude 4.3 tremor occurred 32 km S of Jurm, Afghanistan. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 20:09:51 UTC | 2.7md | 7km W of Petrolia, CA 40.319°, -124.369° | 28.8 km | 2 | - | - | ✓ Reviewed | USGS → |
On July 23, 2021, worldwide seismic activity registered a magnitude 2.7 earthquake 7km W of Petrolia, CA at 20:09 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 20:03:12 UTC | 4.4mb | 4 km SE of Finca Blanco, Panama 8.354°, -82.850° | 17.4 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 seismic event took place 4 km SE of Finca Blanco, Panama on July 23, 2021 at 20:03 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 19:47:49 UTC | 3.2ml | 33km ENE of Dardanelle, CA 38.471°, -119.494° | 7.7 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 3.2 event was detected 33km ENE of Dardanelle, CA on July 23, 2021, with origin time 19:47 UTC. In the 72 hours after this event, the USGS recorded 4 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 19:44:07 UTC | 4.5mb | 110 km S of Kuqa, China 40.720°, 82.963° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 110 km S of Kuqa, China on July 23, 2021 at 19:44 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 19:27:07 UTC | 2.2ml | 7 km S of Stuart, Oklahoma 34.835°, -96.097° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
On July 23, 2021 at 19:27 UTC, a magnitude 2.2 earthquake struck 7 km S of Stuart, Oklahoma. 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. | ||||||||
2021-07-23 2021-07-23 19:25:15 UTC | 2.0md | 2 km NNW of Orocovis, Puerto Rico 18.251°, -66.401° | 40.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 23, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 2 km NNW of Orocovis, Puerto Rico at 19:25 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 19:24:29 UTC | 5.0mb | southern Mid-Atlantic Ridge -47.469°, -12.435° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 5.0 earthquake near southern Mid-Atlantic Ridge at 19:24 UTC on July 23, 2021. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 19:12:01 UTC | 3.1ml | Rat Islands, Aleutian Islands, Alaska 50.240°, 176.806° | 26.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.1 earthquake near Rat Islands, Aleutian Islands, Alaska came in on July 23, 2021 at 19:12 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-23 2021-07-23 18:46:20 UTC | 2.2md | 6km WNW of Cobb, CA 38.834°, -122.793° | 2.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 6km WNW of Cobb, CA on July 23, 2021 at 18:46 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.2 earthquake that occurred about 1 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. | ||||||||
2021-07-23 2021-07-23 18:44:34 UTC | 2.2md | 6km WNW of Cobb, CA 38.834°, -122.790° | 2.3 km | - | - | - | ✓ Reviewed | USGS → |
July 23, 2021 brought a magnitude 2.2 earthquake 6km WNW of Cobb, CA, logged at 18:44 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.2 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 23, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.