Earthquakes on July 30, 2021
500
EARTHQUAKES on July 30, 2021
24-hour UTC period · USGS data
LARGEST: M6.2 — 7 km E of Sullana, Peru
34 km deep · 35 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
41
M3.0–3.9
36
M2.0–2.9
172
M1.0–1.9
247
Activity Summary
500
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.2
7 km E of Sullana, Peru
17:10 UTC · 34.0 km deep
Felt by 35
5.5
140 km SE of Chignik, Alaska
03:52 UTC · 43.4 km deep
Felt by 1
5.3
87 km SSE of Hihifo, Tonga
22:39 UTC · 10.0 km deep
5.0
Easter Island region
22:39 UTC · 10.0 km deep
Felt by 1
4.9
270 km SE of Kandrian, Papua New Guinea
20:05 UTC · 10.0 km deep
4.8
244 km N of Tobelo, Indonesia
17:52 UTC · 114.6 km deep
4.8
Kermadec Islands, New Zealand
14:43 UTC · 10.0 km deep
4.7
142 km S of Akhiok, Alaska
22:11 UTC · 12.0 km deep
Earthquake Map — July 30, 2021
All Earthquakes — July 30, 2021
Showing 30 of 253 (filtered from 500)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-07-30 2021-07-30 23:53:18 UTC | 2.8ml | Nevada 36.066°, -115.363° | 14.8 km | 4 | - | - | ✓ Reviewed | USGS → |
On July 30, 2021 at 23:53 UTC, a magnitude 2.8 earthquake struck near Nevada. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 23:51:35 UTC | 2.6ml | 36 km S of Boca de Yuma, Dominican Republic 18.050°, -68.605° | 124.3 km | - | - | - | ✓ Reviewed | USGS → |
On July 30, 2021 at 23:51 UTC, a magnitude 2.6 earthquake struck 36 km S of Boca de Yuma, Dominican Republic. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 23:41:52 UTC | 3.6ml | 179 km ESE of Chignik, Alaska 55.555°, -155.857° | 33.1 km | - | I | - | ✓ Reviewed | USGS → |
On July 30, 2021, worldwide seismic activity registered a magnitude 3.6 earthquake 179 km ESE of Chignik, Alaska at 23:41 UTC. Coming 2 hours after a magnitude 3.8 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. | ||||||||
2021-07-30 2021-07-30 23:31:38 UTC | 3.3ml | 149 km SE of Chignik, Alaska 55.259°, -156.875° | 42.8 km | - | - | - | ✓ Reviewed | USGS → |
July 30, 2021 brought a magnitude 3.3 earthquake 149 km SE of Chignik, Alaska, logged at 23:31 UTC. Coming 20 hours after a magnitude 5.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 23:18:26 UTC | 3.1md | 2 km SW of Guánica, Puerto Rico 17.957°, -66.919° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 seismic event took place 2 km SW of Guánica, Puerto Rico on July 30, 2021 at 23:18 UTC. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 23:16:20 UTC | 2.1ml | 2 km SSE of P?hala, Hawaii 19.180°, -155.468° | 35.3 km | - | - | - | Auto | USGS → |
On July 30, 2021 at 23:16 UTC, a magnitude 2.1 earthquake struck 2 km SSE of P?hala, Hawaii. This event falls inside the aftershock decay of a nearby magnitude 2.9 earthquake that occurred about 19 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 23:15:45 UTC | 2.1ml | 6 km E of P?hala, Hawaii 19.214°, -155.415° | 31.1 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.1 earthquake 6 km E of P?hala, Hawaii at 23:15 UTC on July 30, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.9 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 22:58:27 UTC | 2.3md | 25km ENE of Dardanelle, CA 38.421°, -119.563° | 4.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 25km ENE of Dardanelle, CA came in on July 30, 2021 at 22:58 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 9 hours earlier. 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. | ||||||||
2021-07-30 2021-07-30 22:39:48 UTC | 5.0mb | Easter Island region -26.827°, -114.290° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On July 30, 2021, worldwide seismic activity registered a magnitude 5.0 earthquake in the Easter Island region at 22:39 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 22:39:16 UTC | 5.3mb | 87 km SSE of Hihifo, Tonga -16.731°, -173.620° | 10.0 km | - | III | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.3 earthquake 87 km SSE of Hihifo, Tonga with origin time 22:39 UTC on July 30, 2021. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 22:36:43 UTC | 4.3mb | 36 km NNW of Yigo Village, Guam 13.841°, 144.756° | 169.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake 36 km NNW of Yigo Village, Guam with origin time 22:36 UTC on July 30, 2021. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 22:16:03 UTC | 2.6ml | 68 km SW of Nanwalek, Alaska 58.967°, -152.857° | 66.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 68 km SW of Nanwalek, Alaska on July 30, 2021 at 22:16 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 22:11:48 UTC | 2.3md | 27km S of Smith Valley, NV 38.543°, -119.395° | 3.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded 27km S of Smith Valley, NV on July 30, 2021 at 22:11 UTC. It arrived roughly 8 hours after a larger magnitude 2.7 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 22:11:41 UTC | 4.7ml | 142 km S of Akhiok, Alaska 55.672°, -154.443° | 12.0 km | - | II | green | ✓ Reviewed | USGS → |
Reports of a magnitude 4.7 earthquake 142 km S of Akhiok, Alaska came in on July 30, 2021 at 22:11 UTC. 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 M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 22:04:01 UTC | 3.1ml | 138 km S of Akhiok, Alaska 55.715°, -154.476° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
July 30, 2021 brought a magnitude 3.1 earthquake 138 km S of Akhiok, Alaska, logged at 22:04 UTC. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:54:47 UTC | 2.9ml | 126 km SSE of Chignik, Alaska 55.333°, -157.320° | 40.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 126 km SSE of Chignik, Alaska with origin time 21:54 UTC on July 30, 2021. This event falls inside the aftershock decay of a nearby magnitude 4.1 earthquake that occurred about 14 hours earlier. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:44:24 UTC | 3.8ml | 168 km ESE of Chignik, Alaska 55.512°, -156.091° | 34.4 km | - | I | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.8 earthquake 168 km ESE of Chignik, Alaska came in on July 30, 2021 at 21:44 UTC. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:41:32 UTC | 4.7mb | Bouvet Island region -54.004°, 6.485° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 seismic event took place in the Bouvet Island region on July 30, 2021 at 21:41 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:37:19 UTC | 2.2ml | 5 km ENE of P?hala, Hawaii 19.221°, -155.425° | 33.0 km | - | - | - | Auto | USGS → |
A magnitude 2.2 earthquake was recorded 5 km ENE of P?hala, Hawaii on July 30, 2021 at 21:37 UTC. Coming 17 hours after a magnitude 2.9 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. | ||||||||
2021-07-30 2021-07-30 21:35:58 UTC | 2.1ml | 6 km ENE of P?hala, Hawaii 19.217°, -155.421° | 33.4 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.1 earthquake 6 km ENE of P?hala, Hawaii came in on July 30, 2021 at 21:35 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.9 earthquake that occurred about 17 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:20:14 UTC | 2.7ml | 62 km SW of Akhiok, Alaska 56.616°, -155.002° | 9.8 km | - | - | - | ✓ Reviewed | USGS → |
At 21:20 UTC on July 30, 2021, a magnitude 2.7 tremor occurred 62 km SW of Akhiok, Alaska. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:13:11 UTC | 2.1ml | 30 km ESE of Old Harbor, Alaska 57.103°, -152.829° | 8.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 30 km ESE of Old Harbor, Alaska on July 30, 2021 at 21:13 UTC. Coming 18 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:10:30 UTC | 4.6mb | Izu Islands, Japan region 29.559°, 142.459° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 earthquake was recorded in the Izu Islands, Japan region on July 30, 2021 at 21:10 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:10:22 UTC | 4.2mb | 14 km N of Bandar-e Gen?veh, Iran 29.704°, 50.538° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 30, 2021 at 21:10 UTC, a magnitude 4.2 earthquake struck 14 km N of Bandar-e Gen?veh, Iran. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 21:08:33 UTC | 2.2ml | 119 km WNW of Yakutat, Alaska 59.934°, -141.706° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 119 km WNW of Yakutat, Alaska on July 30, 2021, with origin time 21:08 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 20:54:52 UTC | 2.8ml | Wyoming 43.928°, -105.623° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 earthquake was recorded near Wyoming on July 30, 2021 at 20:54 UTC. 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. | ||||||||
2021-07-30 2021-07-30 20:14:09 UTC | 4.5mb | 4 km E of Sullana, Peru -4.897°, -80.648° | 39.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 4 km E of Sullana, Peru on July 30, 2021, with origin time 20:14 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.2 earthquake that occurred about 3 hours earlier. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 20:05:53 UTC | 4.9mb | 270 km SE of Kandrian, Papua New Guinea -7.801°, 151.401° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:05 UTC on July 30, 2021, a magnitude 4.9 tremor occurred 270 km SE of Kandrian, Papua New Guinea. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-30 2021-07-30 19:59:47 UTC | 2.3ml | 143 km SE of Chignik, Alaska 55.236°, -157.106° | 33.1 km | - | - | - | ✓ Reviewed | USGS → |
On July 30, 2021, worldwide seismic activity registered a magnitude 2.3 earthquake 143 km SE of Chignik, Alaska at 19:59 UTC. Coming 16 hours after a magnitude 5.5 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. | ||||||||
2021-07-30 2021-07-30 19:57:05 UTC | 2.1ml | 6 km N of P?hala, Hawaii 19.263°, -155.482° | 8.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 6 km N of P?hala, Hawaii on July 30, 2021, with origin time 19:57 UTC. Coming 15 hours after a magnitude 2.9 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. | ||||||||
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 30, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.