Earthquakes on July 29, 2021
500
EARTHQUAKES on July 29, 2021
24-hour UTC period · USGS data
35 km deep · 512 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
15
M4.0–4.9
57
M3.0–3.9
118
M2.0–2.9
133
M1.0–1.9
177
Activity Summary
500
Total earthquakes
~250
Daily average
Elevated
Activity level
15
M5.0+ events
Significant Earthquakes (M4.5+)
8.2
2021 Chignik, Alaska Earthquake
06:15 UTC · 35.0 km deep
Felt by 512
5.9
127 km SE of Chignik, Alaska
06:23 UTC · 0.8 km deep
Felt by 14
5.7
99 km ESE of Chignik, Alaska
06:23 UTC · 35.0 km deep
5.5
44 km NE of Shwebo, Myanmar
08:39 UTC · 10.0 km deep
Felt by 13
5.5
106 km SSE of Perryville, Alaska
06:19 UTC · 18.4 km deep
Felt by 3
5.4
158 km SE of Chignik, Alaska
20:32 UTC · 20.8 km deep
Felt by 1
5.4
154 km SE of Chignik, Alaska
06:32 UTC · 2.9 km deep
Felt by 5
5.3
155 km SE of Chignik, Alaska
16:09 UTC · 36.3 km deep
Earthquake Map — July 29, 2021
All Earthquakes — July 29, 2021
Showing 30 of 323 (filtered from 500)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-07-29 2021-07-29 23:47:25 UTC | 4.5mb | 16 km ENE of Bandar-e Gen?veh, Iran 29.657°, 50.657° | 10.0 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 16 km ENE of Bandar-e Gen?veh, Iran on July 29, 2021 at 23:47 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 23:38:15 UTC | 4.0ml | 153 km SSE of Chignik, Alaska 55.140°, -157.083° | 16.2 km | - | I | green | ✓ Reviewed | USGS → |
On July 29, 2021 at 23:38 UTC, a magnitude 4.0 earthquake struck 153 km SSE of Chignik, Alaska. This event falls inside the aftershock decay of a nearby magnitude 5.3 earthquake that occurred about 7 hours earlier. 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. | ||||||||
2021-07-29 2021-07-29 23:28:44 UTC | 2.3ml | 72 km ESE of Chignik, Alaska 55.950°, -157.421° | 14.1 km | - | - | - | ✓ Reviewed | USGS → |
At 23:28 UTC on July 29, 2021, a magnitude 2.3 tremor occurred 72 km ESE of Chignik, Alaska. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 23:09:14 UTC | 5.0mb | 97 km NW of Murghob, Tajikistan 38.740°, 73.114° | 96.3 km | - | - | - | ✓ Reviewed | USGS → |
On July 29, 2021, worldwide seismic activity registered a magnitude 5.0 earthquake 97 km NW of Murghob, Tajikistan at 23:09 UTC. The event was offshore. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 23:04:40 UTC | 4.9mb | 31 km W of El Habillal, Mexico 17.954°, -102.661° | 17.2 km | 3 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake 31 km W of El Habillal, Mexico at 23:04 UTC on July 29, 2021. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 23:03:33 UTC | 2.5md | 47km W of Ferndale, CA 40.511°, -124.813° | 23.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 47km W of Ferndale, CA on July 29, 2021 at 23:03 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:56:16 UTC | 3.3ml | 75 km NE of Ruby, Alaska 65.167°, -154.251° | 8.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.3 event was detected 75 km NE of Ruby, Alaska on July 29, 2021, with origin time 22:56 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:55:59 UTC | 3.9ml | 153 km SE of Chignik, Alaska 55.428°, -156.502° | 12.7 km | - | I | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.9 earthquake 153 km SE of Chignik, Alaska with origin time 22:55 UTC on July 29, 2021. It arrived roughly 13 hours after a larger magnitude 4.3 mainshock in the same 20 km area, placing it within the typical aftershock window. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:55:16 UTC | 4.7mb | 21 km SSE of Hualien City, Taiwan 23.788°, 121.650° | 4.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 earthquake was recorded 21 km SSE of Hualien City, Taiwan on July 29, 2021 at 22:55 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:40:41 UTC | 2.7ml | 138 km SE of Chignik, Alaska 55.334°, -156.995° | 25.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 138 km SE of Chignik, Alaska came in on July 29, 2021 at 22:40 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.9 earthquake that occurred about 16 hours earlier. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:36:30 UTC | 2.1md | 7 km SSE of P?hala, Hawaii 19.138°, -155.459° | 32.6 km | - | - | - | Auto | USGS → |
This magnitude 2.1 event was detected 7 km SSE of P?hala, Hawaii on July 29, 2021, with origin time 22:36 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 3 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:34:13 UTC | 4.8mb | south of the Fiji Islands -26.795°, -176.027° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.8 event was detected south of the Fiji Islands on July 29, 2021, with origin time 22:34 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:25:20 UTC | 2.8ml | 146 km SE of Perryville, Alaska 54.966°, -157.530° | 25.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.8 earthquake 146 km SE of Perryville, Alaska with origin time 22:25 UTC on July 29, 2021. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 16 hours earlier. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:18:26 UTC | 4.8ml | 150 km SSE of Chignik, Alaska 55.152°, -157.116° | 0.6 km | - | II | green | ✓ Reviewed | USGS → |
Reports of a magnitude 4.8 earthquake 150 km SSE of Chignik, Alaska came in on July 29, 2021 at 22:18 UTC. Coming 6 hours after a magnitude 5.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:03:05 UTC | 4.2mb | 103 km ESE of Iquique, Chile -20.488°, -69.204° | 100.5 km | 5 | - | - | ✓ Reviewed | USGS → |
On July 29, 2021 at 22:03 UTC, a magnitude 4.2 earthquake struck 103 km ESE of Iquique, Chile. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 22:01:38 UTC | 3.0ml | 186 km SSW of Akhiok, Alaska 55.474°, -155.597° | 19.2 km | - | - | - | ✓ Reviewed | USGS → |
On July 29, 2021 at 22:01 UTC, a magnitude 3.0 earthquake struck 186 km SSW of Akhiok, Alaska. Coming 12 hours after a magnitude 4.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:58:11 UTC | 2.8ml | 137 km SSE of Chignik, Alaska 55.229°, -157.282° | 26.1 km | - | - | - | ✓ Reviewed | USGS → |
On July 29, 2021, worldwide seismic activity registered a magnitude 2.8 earthquake 137 km SSE of Chignik, Alaska at 21:58 UTC. Coming 16 hours after a magnitude 5.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:43:56 UTC | 2.3ml | 73 km WNW of Ninilchik, Alaska 60.316°, -152.889° | 132.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 73 km WNW of Ninilchik, Alaska at 21:43 UTC on July 29, 2021. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:41:22 UTC | 3.1md | 4 km NE of Yauco, Puerto Rico 18.057°, -66.819° | 17.0 km | 1 | - | - | ✓ Reviewed | USGS → |
July 29, 2021 brought a magnitude 3.1 earthquake 4 km NE of Yauco, Puerto Rico, logged at 21:41 UTC. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:39:16 UTC | 4.4ml | 153 km SSE of Chignik, Alaska 55.130°, -157.090° | 23.9 km | - | I | green | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 153 km SSE of Chignik, Alaska on July 29, 2021, with origin time 21:39 UTC. It arrived roughly 6 hours after a larger magnitude 5.3 mainshock in the same 20 km area, placing it within the typical aftershock window. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:29:58 UTC | 2.4ml | 2 km E of Quinton, Oklahoma 35.124°, -95.341° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 2 km E of Quinton, Oklahoma with origin time 21:29 UTC on July 29, 2021. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:27:13 UTC | 4.4mb | Fiji region -21.527°, -179.338° | 606.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake in the Fiji region came in on July 29, 2021 at 21:27 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:17:44 UTC | 3.6ml | 192 km SSW of Akhiok, Alaska 55.449°, -155.719° | 40.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.6 earthquake 192 km SSW of Akhiok, Alaska with origin time 21:17 UTC on July 29, 2021. Coming 11 hours after a magnitude 4.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:11:37 UTC | 2.9ml | 19 km WSW of Salamatof, Alaska 60.567°, -151.662° | 72.5 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 19 km WSW of Salamatof, Alaska on July 29, 2021 at 21:11 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:07:53 UTC | 3.4ml | 161 km SE of Chignik, Alaska 55.111°, -156.925° | 16.8 km | - | - | - | ✓ Reviewed | USGS → |
At 21:07 UTC on July 29, 2021, a magnitude 3.4 tremor occurred 161 km SE of Chignik, Alaska. It arrived roughly 1 hours after a larger magnitude 5.4 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:07:10 UTC | 3.2ml | 145 km SSE of Chignik, Alaska 55.172°, -157.210° | 9.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.2 earthquake 145 km SSE of Chignik, Alaska with origin time 21:07 UTC on July 29, 2021. This event falls inside the aftershock decay of a nearby magnitude 5.3 earthquake that occurred about 5 hours earlier. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:04:52 UTC | 3.3ml | 35 km N of Valdez, Alaska 61.443°, -146.476° | 19.7 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.3 earthquake 35 km N of Valdez, Alaska came in on July 29, 2021 at 21:04 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 21:00:04 UTC | 4.7ml | 128 km SSE of Perryville, Alaska 54.951°, -158.018° | 2.5 km | - | II | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.7 earthquake 128 km SSE of Perryville, Alaska with origin time 21:00 UTC on July 29, 2021. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-29 2021-07-29 20:56:01 UTC | 2.5ml | 135 km SSE of Perryville, Alaska 54.904°, -157.954° | 27.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 135 km SSE of Perryville, Alaska at 20:56 UTC on July 29, 2021. It arrived roughly 13 hours after a larger magnitude 3.4 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. | ||||||||
2021-07-29 2021-07-29 20:55:55 UTC | 5.1mb | southern East Pacific Rise -35.070°, -111.684° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 29, 2021 at 20:55 UTC, a magnitude 5.1 earthquake struck near southern East Pacific Rise. See the M5.1 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 29, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.