Earthquakes on July 27, 2021
292
EARTHQUAKES on July 27, 2021
24-hour UTC period · USGS data
LARGEST: M4.9 — Kermadec Islands region
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
0
M4.0–4.9
34
M3.0–3.9
8
M2.0–2.9
61
M1.0–1.9
189
Activity Summary
292
Total earthquakes
~250
Daily average
Normal
Activity level
0
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
4.9
Kermadec Islands region
16:22 UTC · 10.0 km deep
4.9
92 km SSW of Trenggalek, Indonesia
16:21 UTC · 49.6 km deep
Felt by 2
4.9
South Sandwich Islands region
08:23 UTC · 35.0 km deep
4.8
129 km W of Höfn, Iceland
22:12 UTC · 10.0 km deep
Felt by 3
4.8
81 km NE of Hihifo, Tonga
20:26 UTC · 32.2 km deep
Felt by 7
4.8
north of Severnaya Zemlya
06:17 UTC · 10.0 km deep
4.7
Volcano Islands, Japan region
07:39 UTC · 10.0 km deep
4.7
south of the Fiji Islands
05:55 UTC · 536.4 km deep
Earthquake Map — July 27, 2021
All Earthquakes — July 27, 2021
Showing 30 of 103 (filtered from 292)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-07-27 2021-07-27 23:57:45 UTC | 2.2ml | 13 km S of Fern Forest, Hawaii 19.346°, -155.112° | 6.2 km | - | - | - | ✓ Reviewed | USGS → |
On July 27, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 13 km S of Fern Forest, Hawaii at 23:57 UTC. Coming 21 hours after a magnitude 2.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 23:33:32 UTC | 2.5md | 31km SE of Markleeville, CA 38.527°, -119.507° | 6.1 km | 4 | - | - | ✓ Reviewed | USGS → |
On July 27, 2021 at 23:33 UTC, a magnitude 2.5 earthquake struck 31km SE of Markleeville, CA. It arrived roughly 7 hours after a larger magnitude 2.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 23:07:33 UTC | 2.2md | 31km SE of Markleeville, CA 38.525°, -119.509° | 6.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 31km SE of Markleeville, CA came in on July 27, 2021 at 23:07 UTC. Coming 7 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 22:55:20 UTC | 4.2mb | 62 km WSW of Attu Station, Alaska 52.548°, 172.405° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 62 km WSW of Attu Station, Alaska with origin time 22:55 UTC on July 27, 2021. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 22:52:31 UTC | 2.0ml | 19km E of Little Lake, CA 35.941°, -117.693° | 2.8 km | - | - | - | ✓ Reviewed | USGS → |
At 22:52 UTC on July 27, 2021, a magnitude 2.0 tremor occurred 19km E of Little Lake, CA. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 22:42:51 UTC | 2.0md | 8km ENE of Interlaken, CA 36.988°, -121.657° | 5.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 8km ENE of Interlaken, CA on July 27, 2021 at 22:42 UTC. Coming 5 hours after a magnitude 2.3 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. | ||||||||
2021-07-27 2021-07-27 22:18:09 UTC | 2.4ml | 24km NW of Santa Cruz Is. (E end), CA 34.207°, -119.664° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.4 earthquake 24km NW of Santa Cruz Is. (E end), CA came in on July 27, 2021 at 22:18 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 22:12:11 UTC | 4.8mb | 129 km W of Höfn, Iceland 64.481°, -17.853° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
On July 27, 2021, worldwide seismic activity registered a magnitude 4.8 earthquake 129 km W of Höfn, Iceland at 22:12 UTC. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 22:08:01 UTC | 4.4mb | Reykjanes Ridge 56.593°, -34.343° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:08 UTC on July 27, 2021, a magnitude 4.4 tremor occurred near Reykjanes Ridge. Coming 6 hours after a magnitude 4.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 20:39:50 UTC | 2.1md | 29km SE of Markleeville, CA 38.527°, -119.535° | 3.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 27, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 29km SE of Markleeville, CA at 20:39 UTC. It arrived roughly 4 hours after a larger magnitude 2.6 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 20:26:49 UTC | 2.9ml | 40 km ESE of Atka, Alaska 52.044°, -173.662° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 40 km ESE of Atka, Alaska with origin time 20:26 UTC on July 27, 2021. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 20:26:15 UTC | 4.8mb | 81 km NE of Hihifo, Tonga -15.464°, -173.235° | 32.2 km | 7 | - | - | ✓ Reviewed | USGS → |
At 20:26 UTC on July 27, 2021, a magnitude 4.8 tremor occurred 81 km NE of Hihifo, Tonga. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 20:20:22 UTC | 3.4ml | 109 km ESE of Akutan, Alaska 53.657°, -164.323° | 21.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.4 seismic event took place 109 km ESE of Akutan, Alaska on July 27, 2021 at 20:20 UTC. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 20:15:59 UTC | 2.1ml | 1 km SW of P?hala, Hawaii 19.190°, -155.488° | 30.5 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.1 earthquake 1 km SW of P?hala, Hawaii came in on July 27, 2021 at 20:15 UTC. It arrived roughly 3 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 20:01:46 UTC | 3.8ml | 256 km SE of Chiniak, Alaska 56.019°, -149.254° | 20.1 km | - | - | - | ✓ Reviewed | USGS → |
At 20:01 UTC on July 27, 2021, a magnitude 3.8 tremor occurred 256 km SE of Chiniak, Alaska. The event was offshore. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 20:00:44 UTC | 4.1mb | 6 km SW of Shëngjin, Albania 41.776°, 19.530° | 15.1 km | - | - | - | ✓ Reviewed | USGS → |
On July 27, 2021 at 20:00 UTC, a magnitude 4.1 earthquake struck 6 km SW of Shëngjin, Albania. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 19:57:34 UTC | 4.4mb | 80 km S of Shihezi, China 43.586°, 86.191° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 80 km S of Shihezi, China at 19:57 UTC on July 27, 2021. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 19:46:58 UTC | 2.3md | 2km WNW of Concord, CA 37.974°, -122.032° | 17.0 km | 4 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 2km WNW of Concord, CA with origin time 19:46 UTC on July 27, 2021. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 19:10:49 UTC | 2.2ml | 77 km SSE of Akutan, Alaska 53.472°, -165.384° | 25.8 km | - | - | - | ✓ Reviewed | USGS → |
July 27, 2021 brought a magnitude 2.2 earthquake 77 km SSE of Akutan, Alaska, logged at 19:10 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 19:06:34 UTC | 2.9ml | 59 km E of Cantwell, Alaska 63.495°, -147.777° | 1.9 km | - | - | - | ✓ Reviewed | USGS → |
On July 27, 2021, worldwide seismic activity registered a magnitude 2.9 earthquake 59 km E of Cantwell, Alaska at 19:06 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 19:03:08 UTC | 4.2mb | Fiji region -18.854°, -177.654° | 592.8 km | - | - | - | ✓ Reviewed | USGS → |
On July 27, 2021, worldwide seismic activity registered a magnitude 4.2 earthquake in the Fiji region at 19:03 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 19:02:12 UTC | 4.3mb | 113 km WNW of Höfn, Iceland 64.638°, -17.385° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
July 27, 2021 brought a magnitude 4.3 earthquake 113 km WNW of Höfn, Iceland, logged at 19:02 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 18:32:26 UTC | 4.5mb | 97 km WNW of Luwuk, Indonesia -0.662°, 121.959° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 97 km WNW of Luwuk, Indonesia on July 27, 2021 at 18:32 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 18:31:53 UTC | 2.4ml | 132 km ESE of Cordova, Alaska 60.210°, -143.449° | 1.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.4 earthquake 132 km ESE of Cordova, Alaska at 18:31 UTC on July 27, 2021. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 18:29:26 UTC | 2.4ml | 5 km W of Volcano, Hawaii 19.440°, -155.289° | 0.7 km | - | - | - | Auto | USGS → |
July 27, 2021 brought a magnitude 2.4 earthquake 5 km W of Volcano, Hawaii, logged at 18:29 UTC. It arrived roughly 15 hours after a larger magnitude 2.5 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 M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 18:12:25 UTC | 2.3md | 2km E of Aromas, CA 36.893°, -121.615° | -0.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 2km E of Aromas, CA at 18:12 UTC on July 27, 2021. 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. | ||||||||
2021-07-27 2021-07-27 18:10:14 UTC | 2.0md | 11km W of Alder Springs, CA 39.670°, -122.854° | 5.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 11km W of Alder Springs, CA came in on July 27, 2021 at 18:10 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 13 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 17:56:10 UTC | 2.2ml | 187 km SE of Atka, Alaska 50.983°, -172.318° | 10.8 km | - | - | - | ✓ Reviewed | USGS → |
On July 27, 2021 at 17:56 UTC, a magnitude 2.2 earthquake struck 187 km SE of Atka, Alaska. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 17:51:24 UTC | 4.0mb | 27 km SSE of Cubará, Colombia 6.768°, -72.031° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.0 earthquake 27 km SSE of Cubará, Colombia with origin time 17:51 UTC on July 27, 2021. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-27 2021-07-27 17:34:41 UTC | 4.0mb | 272 km E of Levuka, Fiji -18.130°, -178.113° | 576.2 km | - | - | - | ✓ Reviewed | USGS → |
On July 27, 2021, worldwide seismic activity registered a magnitude 4.0 earthquake 272 km E of Levuka, Fiji at 17:34 UTC. It arrived roughly 10 hours after a larger magnitude 4.2 mainshock in the same 20 km area, placing it within the typical aftershock window. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.0 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 27, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.