Earthquakes on July 21, 2021
427
EARTHQUAKES on July 21, 2021
24-hour UTC period · USGS data
LARGEST: M6.7 — 71 km S of Burica, Panama
10 km deep · 235 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
34
M3.0–3.9
16
M2.0–2.9
92
M1.0–1.9
281
Activity Summary
427
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.7
71 km S of Burica, Panama
21:15 UTC · 10.0 km deep
Felt by 235
6.0
142 km SSW of Lorengau, Papua New Guinea
14:26 UTC · 8.4 km deep
5.4
Tristan da Cunha region
02:19 UTC · 10.0 km deep
5.2
56 km W of Rantepao, Indonesia
17:44 UTC · 12.8 km deep
Felt by 2
4.9
70 km S of Burica, Panama
22:25 UTC · 10.0 km deep
Felt by 2
4.9
86 km NNE of Calama, Chile
16:23 UTC · 103.6 km deep
Felt by 3
4.9
7 km SSE of San Ignacio, Peru
15:07 UTC · 31.9 km deep
Felt by 1
4.9
187 km NE of Lospalos, Timor Leste
04:33 UTC · 138.4 km deep
Earthquake Map — July 21, 2021
All Earthquakes — July 21, 2021
Showing 30 of 146 (filtered from 427)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-07-21 2021-07-21 23:43:06 UTC | 2.3ml | 52 km W of Tatitlek, Alaska 60.879°, -147.653° | 8.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 52 km W of Tatitlek, Alaska on July 21, 2021, with origin time 23:43 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 23:33:38 UTC | 3.2ml | 30km SE of Markleeville, CA 38.514°, -119.532° | 5.0 km | 10 | - | - | ✓ Reviewed | USGS → |
July 21, 2021 brought a magnitude 3.2 earthquake 30km SE of Markleeville, CA, logged at 23:33 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 23:32:59 UTC | 2.0md | 31km SSW of Smith Valley, NV 38.527°, -119.494° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 31km SSW of Smith Valley, NV on July 21, 2021, with origin time 23:32 UTC. It arrived roughly 20 hours after a larger magnitude 3.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 23:31:49 UTC | 2.1ml | 53 km E of Savoonga, Alaska 63.705°, -169.396° | 16.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 53 km E of Savoonga, Alaska with origin time 23:31 UTC on July 21, 2021. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 23:12:28 UTC | 2.1ml | 57 km S of Whites City, New Mexico 31.660°, -104.308° | 7.2 km | - | - | - | ✓ Reviewed | USGS → |
On July 21, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 57 km S of Whites City, New Mexico at 23:12 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 23:07:46 UTC | 4.8mb | 146 km SSW of Lorengau, Papua New Guinea -3.322°, 146.974° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
July 21, 2021 brought a magnitude 4.8 earthquake 146 km SSW of Lorengau, Papua New Guinea, logged at 23:07 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 23:03:46 UTC | 3.9mb | 19 km SSW of Polichnítos, Greece 38.922°, 26.091° | 14.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.9 seismic event took place 19 km SSW of Polichnítos, Greece on July 21, 2021 at 23:03 UTC. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 23:02:00 UTC | 2.5md | 28km SE of Markleeville, CA 38.548°, -119.530° | 4.1 km | - | - | - | ✓ Reviewed | USGS → |
At 23:02 UTC on July 21, 2021, a magnitude 2.5 tremor occurred 28km SE of Markleeville, CA. This event falls inside the aftershock decay of a nearby magnitude 3.1 earthquake that occurred about 19 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 22:59:40 UTC | 2.1md | 8 km E of P?hala, Hawaii 19.212°, -155.396° | 31.6 km | - | - | - | Auto | USGS → |
A magnitude 2.1 earthquake was recorded 8 km E of P?hala, Hawaii on July 21, 2021 at 22:59 UTC. It arrived roughly 2 hours after a larger magnitude 3.1 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 22:25:58 UTC | 4.9mb | 70 km S of Burica, Panama 7.401°, -82.775° | 10.0 km | 2 | - | - | ✓ Reviewed | USGS → |
At 22:25 UTC on July 21, 2021, a magnitude 4.9 tremor occurred 70 km S of Burica, Panama. This event falls inside the aftershock decay of a nearby magnitude 6.7 earthquake that occurred about 1 hours earlier. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 22:16:48 UTC | 2.1ml | 29 km SW of Coyanosa, Texas 31.094°, -103.322° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
At 22:16 UTC on July 21, 2021, a magnitude 2.1 tremor occurred 29 km SW of Coyanosa, Texas. 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. | ||||||||
2021-07-21 2021-07-21 21:56:14 UTC | 2.3md | 8km NW of The Geysers, CA 38.832°, -122.818° | 1.5 km | 2 | - | - | ✓ Reviewed | USGS → |
July 21, 2021 brought a magnitude 2.3 earthquake 8km NW of The Geysers, CA, logged at 21:56 UTC. 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. | ||||||||
2021-07-21 2021-07-21 21:49:47 UTC | 2.0ml | 269 km W of Adak, Alaska 51.973°, 179.454° | 147.4 km | - | - | - | ✓ Reviewed | USGS → |
July 21, 2021 brought a magnitude 2.0 earthquake 269 km W of Adak, Alaska, logged at 21:49 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 21:46:21 UTC | 2.0ml | 58 km S of Whites City, New Mexico 31.652°, -104.298° | 6.7 km | - | - | - | ✓ Reviewed | USGS → |
On July 21, 2021 at 21:46 UTC, a magnitude 2.0 earthquake struck 58 km S of Whites City, New Mexico. This event falls inside the aftershock decay of a nearby magnitude 2.1 earthquake that occurred about 17 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 21:44:09 UTC | 2.0ml | 92 km S of Atka, Alaska 51.366°, -174.053° | 19.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 92 km S of Atka, Alaska on July 21, 2021 at 21:44 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 21:34:38 UTC | 4.6mb | 29 km SSE of Burica, Panama 7.772°, -82.808° | 10.0 km | 2 | - | - | ✓ Reviewed | USGS → |
At 21:34 UTC on July 21, 2021, a magnitude 4.6 tremor occurred 29 km SSE of Burica, Panama. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 21:25:32 UTC | 2.6ml | 28 km SSE of Mina, Nevada 38.143°, -118.021° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
On July 21, 2021 at 21:25 UTC, a magnitude 2.6 earthquake struck 28 km SSE of Mina, Nevada. It arrived roughly 9 hours after a larger magnitude 3.9 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 M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 21:15:12 UTC | 6.7mww | 71 km S of Burica, Panama 7.393°, -82.779° | 10.0 km | 235 | V | green | ✓ Reviewed | USGS → |
On July 21, 2021 at 21:15 UTC, a magnitude 6.7 earthquake struck 71 km S of Burica, Panama. 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. | ||||||||
2021-07-21 2021-07-21 20:52:33 UTC | 2.2ml | 8 km ESE of P?hala, Hawaii 19.182°, -155.405° | 35.1 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.2 earthquake 8 km ESE of P?hala, Hawaii with origin time 20:52 UTC on July 21, 2021. It arrived roughly 1 hours after a larger magnitude 3.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 20:50:11 UTC | 2.1md | 8 km ESE of P?hala, Hawaii 19.182°, -155.401° | 35.2 km | - | - | - | Auto | USGS → |
On July 21, 2021 at 20:50 UTC, a magnitude 2.1 earthquake struck 8 km ESE of P?hala, Hawaii. Coming 1 hours after a magnitude 3.1 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. | ||||||||
2021-07-21 2021-07-21 20:31:48 UTC | 2.0ml | 66 km SSE of King Cove, Alaska 54.549°, -161.796° | 17.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 66 km SSE of King Cove, Alaska with origin time 20:31 UTC on July 21, 2021. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 20:30:28 UTC | 3.1ml | 6 km E of P?hala, Hawaii 19.213°, -155.417° | 36.4 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 earthquake was recorded 6 km E of P?hala, Hawaii on July 21, 2021 at 20:30 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 M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 20:19:14 UTC | 2.0ml | 38 km ENE of Pedro Bay, Alaska 59.941°, -153.487° | 131.9 km | - | - | - | ✓ Reviewed | USGS → |
On July 21, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 38 km ENE of Pedro Bay, Alaska at 20:19 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 20:09:29 UTC | 4.4mb | 16 km WSW of Tubajon, Philippines 10.281°, 125.421° | 121.2 km | - | - | - | ✓ Reviewed | USGS → |
On July 21, 2021 at 20:09 UTC, a magnitude 4.4 earthquake struck 16 km WSW of Tubajon, Philippines. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 19:55:44 UTC | 3.4md | 85 km N of San Juan, Puerto Rico 19.227°, -65.981° | 29.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.4 event was detected 85 km N of San Juan, Puerto Rico on July 21, 2021, with origin time 19:55 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.6 earthquake that occurred about 1 hours earlier. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 19:41:22 UTC | 3.2md | 80 km N of San Juan, Puerto Rico 19.189°, -66.001° | 25.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 21, 2021 at 19:41 UTC, a magnitude 3.2 earthquake struck 80 km N of San Juan, Puerto Rico. Coming 1 hours after a magnitude 3.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 19:37:43 UTC | 3.5md | 79 km N of San Juan, Puerto Rico 19.181°, -66.007° | 21.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:37 UTC on July 21, 2021, a magnitude 3.5 tremor occurred 79 km N of San Juan, Puerto Rico. Coming 1 hours after a magnitude 3.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 19:36:17 UTC | 2.2md | 32km SSW of Smith Valley, NV 38.522°, -119.485° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 21, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 32km SSW of Smith Valley, NV at 19:36 UTC. It arrived roughly 16 hours after a larger magnitude 3.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 19:11:00 UTC | 3.6md | 82 km N of San Juan, Puerto Rico 19.203°, -65.992° | 24.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 21, 2021, worldwide seismic activity registered a magnitude 3.6 earthquake 82 km N of San Juan, Puerto Rico at 19:11 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 M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-21 2021-07-21 18:56:57 UTC | 2.0ml | 37 km NNW of Toyah, Texas 31.607°, -103.987° | 9.1 km | - | - | - | ✓ Reviewed | USGS → |
At 18:56 UTC on July 21, 2021, a magnitude 2.0 tremor occurred 37 km NNW of Toyah, Texas. Coming 6 hours after a magnitude 2.5 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. | ||||||||
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 21, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.