Earthquakes on August 6, 2021
336
EARTHQUAKES on August 6, 2021
24-hour UTC period · USGS data
LARGEST: M5.9 — South Sandwich Islands region
35 km deep · 1 person felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
42
M3.0–3.9
11
M2.0–2.9
71
M1.0–1.9
206
Activity Summary
336
Total earthquakes
~250
Daily average
Elevated
Activity level
6
M5.0+ events
Significant Earthquakes (M4.5+)
5.9
South Sandwich Islands region
19:22 UTC · 35.0 km deep
Felt by 1
5.3
49 km E of Yilan, Taiwan
08:11 UTC · 10.0 km deep
Felt by 7
5.2
91 km E of Yujing, Taiwan
11:12 UTC · 7.3 km deep
Felt by 3
5.2
108 km SW of Bandar Lampung, Indonesia
11:08 UTC · 55.0 km deep
Felt by 22
5.1
Nicobar Islands, India region
08:19 UTC · 10.0 km deep
5.0
Pacific-Antarctic Ridge
00:59 UTC · 10.0 km deep
4.9
38 km SSW of Sola, Vanuatu
13:35 UTC · 196.3 km deep
4.9
Pacific-Antarctic Ridge
06:09 UTC · 10.0 km deep
Earthquake Map — August 6, 2021
All Earthquakes — August 6, 2021
Showing 30 of 130 (filtered from 336)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-08-06 2021-08-06 23:58:04 UTC | 2.5ml | 11 km S of Fern Forest, Hawaii 19.364°, -155.144° | 2.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 6, 2021 at 23:58 UTC, a magnitude 2.5 earthquake struck 11 km S of Fern Forest, Hawaii. Coming 4 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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. | ||||||||
2021-08-06 2021-08-06 23:57:37 UTC | 2.2ml | 6 km SSW of Volcano, Hawaii 19.382°, -155.252° | 0.3 km | - | - | - | Auto | USGS → |
On August 6, 2021 at 23:57 UTC, a magnitude 2.2 earthquake struck 6 km SSW of Volcano, Hawaii. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 4 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. | ||||||||
2021-08-06 2021-08-06 23:57:36 UTC | 2.2ml | 6 km SSW of Volcano, Hawaii 19.385°, -155.246° | 1.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 6 km SSW of Volcano, Hawaii on August 6, 2021 at 23:57 UTC. Coming 4 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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. | ||||||||
2021-08-06 2021-08-06 23:53:54 UTC | 2.3ml | 262 km SSE of Perryville, Alaska 53.860°, -157.133° | 20.9 km | - | - | - | ✓ Reviewed | USGS → |
On August 6, 2021 at 23:53 UTC, a magnitude 2.3 earthquake struck 262 km SSE of Perryville, Alaska. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 23:26:32 UTC | 4.5mb | 188 km NNE of Laikit, Laikit II (Dimembe), Indonesia 2.907°, 125.912° | 56.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 188 km NNE of Laikit, Laikit II (Dimembe), Indonesia on August 6, 2021, with origin time 23:26 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 23:15:02 UTC | 4.6mb | Vanuatu -15.487°, 167.751° | 123.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 6, 2021, worldwide seismic activity registered a magnitude 4.6 earthquake near Vanuatu at 23:15 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 23:08:52 UTC | 4.0mb | 161 km SW of Lebu, Chile -38.519°, -75.090° | 21.7 km | - | - | - | ✓ Reviewed | USGS → |
On August 6, 2021, worldwide seismic activity registered a magnitude 4.0 earthquake 161 km SW of Lebu, Chile at 23:08 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 23:01:30 UTC | 2.2ml | south of Alaska 55.513°, -156.680° | 49.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake south of Alaska with origin time 23:01 UTC on August 6, 2021. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 22:33:09 UTC | 3.3ml | 167 km SSE of False Pass, Alaska 53.413°, -162.649° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 6, 2021 at 22:33 UTC, a magnitude 3.3 earthquake struck 167 km SSE of False Pass, Alaska. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 22:22:29 UTC | 2.5ml | 160 km SE of Chignik, Alaska 55.072°, -156.913° | 39.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 160 km SE of Chignik, Alaska at 22:22 UTC on August 6, 2021. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 22:09:52 UTC | 4.3mb | 68 km SW of Acajutla, El Salvador 13.154°, -90.279° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 68 km SW of Acajutla, El Salvador on August 6, 2021, with origin time 22:09 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 22:09:11 UTC | 2.5ml | 86 km NW of Aleneva, Alaska 58.616°, -153.934° | 93.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 86 km NW of Aleneva, Alaska on August 6, 2021, with origin time 22:09 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 21:59:28 UTC | 2.0md | 12km NW of Pinnacles, CA 36.612°, -121.224° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
August 6, 2021 brought a magnitude 2.0 earthquake 12km NW of Pinnacles, CA, logged at 21:59 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 21:45:57 UTC | 2.1ml | 5 km ENE of P?hala, Hawaii 19.220°, -155.426° | 32.2 km | - | - | - | Auto | USGS → |
A magnitude 2.1 earthquake was recorded 5 km ENE of P?hala, Hawaii on August 6, 2021 at 21:45 UTC. It arrived roughly 12 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 21:33:08 UTC | 2.7ml | 30 km S of Mina, Nevada 38.113°, -118.080° | 10.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.7 event was detected 30 km S of Mina, Nevada on August 6, 2021, with origin time 21:33 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 21:26:41 UTC | 2.0ml | 37 km SE of Mina, Nevada 38.198°, -117.759° | 11.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 6, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 37 km SE of Mina, Nevada at 21:26 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 21:17:24 UTC | 4.5mb | 158 km SSE of Tondano, Indonesia -0.045°, 125.393° | 56.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 158 km SSE of Tondano, Indonesia came in on August 6, 2021 at 21:17 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 21:12:04 UTC | 2.0ml | 70 km W of Salamatof, Alaska 60.668°, -152.612° | 113.6 km | - | - | - | ✓ Reviewed | USGS → |
At 21:12 UTC on August 6, 2021, a magnitude 2.0 tremor occurred 70 km W of Salamatof, Alaska. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 21:02:19 UTC | 2.2ml | 12 km NE of Sprague, Washington 47.383°, -117.859° | -0.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 12 km NE of Sprague, Washington on August 6, 2021 at 21:02 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. | ||||||||
2021-08-06 2021-08-06 20:47:35 UTC | 3.0md | 4 km SSE of La Parguera, Puerto Rico 17.942°, -67.030° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
August 6, 2021 brought a magnitude 3.0 earthquake 4 km SSE of La Parguera, Puerto Rico, logged at 20:47 UTC. Coming 17 hours after a magnitude 3.1 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. | ||||||||
2021-08-06 2021-08-06 20:41:58 UTC | 4.1mb | 40 km SSW of Mandráki, Greece 36.250°, 27.040° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 6, 2021 at 20:41 UTC, a magnitude 4.1 earthquake struck 40 km SSW of Mandráki, Greece. This event falls inside the aftershock decay of a nearby magnitude 4.4 earthquake that occurred about 11 hours earlier. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 20:24:31 UTC | 2.0md | 2 km SSE of P?hala, Hawaii 19.180°, -155.472° | 33.7 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.0 earthquake 2 km SSE of P?hala, Hawaii with origin time 20:24 UTC on August 6, 2021. Coming 10 hours after a magnitude 2.4 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. | ||||||||
2021-08-06 2021-08-06 20:17:39 UTC | 2.7ml | 66 km S of Atka, Alaska 51.594°, -174.171° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 66 km S of Atka, Alaska came in on August 6, 2021 at 20:17 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 20:16:07 UTC | 4.5mb | 36 km WNW of Pakokku, Myanmar 21.410°, 94.738° | 110.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 36 km WNW of Pakokku, Myanmar on August 6, 2021 at 20:16 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 20:11:07 UTC | 2.2ml | 18 km NNE of Goldsmith, Texas 32.140°, -102.565° | 4.4 km | - | - | - | ✓ Reviewed | USGS → |
On August 6, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 18 km NNE of Goldsmith, Texas at 20:11 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. | ||||||||
2021-08-06 2021-08-06 20:02:13 UTC | 2.3ml | 3 km NW of Honaunau-Napoopoo, Hawaii 19.483°, -155.886° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 3 km NW of Honaunau-Napoopoo, Hawaii on August 6, 2021 at 20:02 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 20:00:02 UTC | 4.5mb | South Sandwich Islands region -59.828°, -26.070° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
August 6, 2021 brought a magnitude 4.5 earthquake in the South Sandwich Islands region, logged at 20:00 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 19:57:08 UTC | 4.2mb | 41 km S of Mandráki, Greece 36.241°, 27.095° | 25.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 41 km S of Mandráki, Greece with origin time 19:57 UTC on August 6, 2021. Coming 11 hours after a magnitude 4.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-06 2021-08-06 19:56:26 UTC | 2.5md | 30km ENE of Dardanelle, CA 38.472°, -119.534° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 30km ENE of Dardanelle, CA on August 6, 2021 at 19:56 UTC. 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. | ||||||||
2021-08-06 2021-08-06 19:36:48 UTC | 2.6ml | 8 km SSE of Volcano, Hawaii 19.369°, -155.216° | 2.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 8 km SSE of Volcano, Hawaii with origin time 19:36 UTC on August 6, 2021. 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 M2.6 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 August 6, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.