Earthquakes on July 4, 2021
270
EARTHQUAKES on July 4, 2021
24-hour UTC period · USGS data
LARGEST: M6.0 — 72 km WSW of Vallenar, Chile
22 km deep · 24 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
43
M3.0–3.9
12
M2.0–2.9
50
M1.0–1.9
160
Activity Summary
270
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.0
72 km WSW of Vallenar, Chile
01:29 UTC · 22.0 km deep
Felt by 24
5.9
75 km WSW of Vallenar, Chile
01:01 UTC · 24.0 km deep
Felt by 26
5.6
89 km WNW of Corral del Risco (Punta de Mita), Mexico
02:44 UTC · 10.0 km deep
Felt by 111
5.2
South Sandwich Islands region
18:16 UTC · 35.0 km deep
5.0
93 km NNW of Ambon, Indonesia
16:18 UTC · 10.0 km deep
4.9
Banda Sea
01:27 UTC · 555.9 km deep
4.8
Vanuatu
23:32 UTC · 10.0 km deep
4.8
108 km NW of Gizo, Solomon Islands
12:04 UTC · 35.3 km deep
Earthquake Map — July 4, 2021
All Earthquakes — July 4, 2021
Showing 30 of 110 (filtered from 270)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-07-04 2021-07-04 23:52:57 UTC | 4.3mb | 134 km NNE of Tobelo, Indonesia 2.839°, 128.511° | 223.3 km | - | - | - | ✓ Reviewed | USGS → |
July 4, 2021 brought a magnitude 4.3 earthquake 134 km NNE of Tobelo, Indonesia, logged at 23:52 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 23:47:34 UTC | 2.7ml | 266 km WSW of Adak, Alaska 51.028°, 179.784° | 23.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.7 earthquake 266 km WSW of Adak, Alaska at 23:47 UTC on July 4, 2021. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 23:44:40 UTC | 4.4mb | South Sandwich Islands region -57.774°, -26.288° | 114.9 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2021 at 23:44 UTC, a magnitude 4.4 earthquake struck in the South Sandwich Islands region. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 23:40:22 UTC | 4.3mwr | 92 km W of Vallenar, Chile -28.697°, -71.696° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2021 at 23:40 UTC, a magnitude 4.3 earthquake struck 92 km W of Vallenar, Chile. It arrived roughly 23 hours after a larger magnitude 5.9 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 23:32:30 UTC | 4.8mb | Vanuatu -17.617°, 167.737° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.8 event was detected near Vanuatu on July 4, 2021, with origin time 23:32 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 23:08:03 UTC | 3.0ml | 88 km WSW of Nikolski, Alaska 52.711°, -170.111° | 144.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.0 event was detected 88 km WSW of Nikolski, Alaska on July 4, 2021, with origin time 23:08 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 23:04:16 UTC | 4.1mb | 151 km WSW of Naze, Japan 28.016°, 127.990° | 5.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.1 earthquake 151 km WSW of Naze, Japan with origin time 23:04 UTC on July 4, 2021. It arrived roughly 10 hours after a larger magnitude 4.4 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 22:50:52 UTC | 2.1md | 5 km E of P?hala, Hawaii 19.199°, -155.427° | 36.7 km | - | - | - | Auto | USGS → |
A magnitude 2.1 seismic event took place 5 km E of P?hala, Hawaii on July 4, 2021 at 22:50 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 8 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 22:50:46 UTC | 3.0ml | 93 km WNW of Karluk, Alaska 57.916°, -155.881° | 8.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 93 km WNW of Karluk, Alaska came in on July 4, 2021 at 22:50 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 22:44:27 UTC | 2.4ml | 22 km W of Mina, Nevada 38.407°, -118.369° | 11.4 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.4 earthquake 22 km W of Mina, Nevada at 22:44 UTC on July 4, 2021. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 22:35:00 UTC | 2.8ml | 28 km NE of Washington Park, Arizona 34.632°, -111.079° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.8 earthquake 28 km NE of Washington Park, Arizona with origin time 22:35 UTC on July 4, 2021. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 22:13:39 UTC | 4.4mb | Celebes Sea 3.292°, 122.577° | 544.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded near Celebes Sea on July 4, 2021 at 22:13 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 22:11:29 UTC | 4.2mb | 85 km WSW of Vallenar, Chile -28.771°, -71.605° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 seismic event took place 85 km WSW of Vallenar, Chile on July 4, 2021 at 22:11 UTC. Coming 21 hours after a magnitude 6.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 22:05:21 UTC | 4.0mb | 150 km N of Nago, Japan 27.970°, 127.847° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.0 earthquake 150 km N of Nago, Japan at 22:05 UTC on July 4, 2021. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 21:48:30 UTC | 4.0mb | 259 km NE of Qamdo, China 32.971°, 98.882° | 15.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.0 event was detected 259 km NE of Qamdo, China on July 4, 2021, with origin time 21:48 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 21:37:30 UTC | 2.4md | 11km SSW of Lake Nacimiento, CA 35.641°, -120.944° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 11km SSW of Lake Nacimiento, CA with origin time 21:37 UTC on July 4, 2021. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 21:36:46 UTC | 4.3mb | 40 km E of Palora, Ecuador -1.659°, -77.604° | 168.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded 40 km E of Palora, Ecuador on July 4, 2021 at 21:36 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 21:25:02 UTC | 3.0ml | 85 km SSE of Adak, Alaska 51.215°, -176.007° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 seismic event took place 85 km SSE of Adak, Alaska on July 4, 2021 at 21:25 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 21:17:42 UTC | 3.6mwr | 43 km S of Ten Sleep, Wyoming 43.646°, -107.376° | 16.6 km | 3 | III | green | ✓ Reviewed | USGS → |
A magnitude 3.6 earthquake was recorded 43 km S of Ten Sleep, Wyoming on July 4, 2021 at 21:17 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 21:08:08 UTC | 4.5mb | Fiji region -17.224°, -177.147° | 564.6 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2021, worldwide seismic activity registered a magnitude 4.5 earthquake in the Fiji region at 21:08 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 21:01:26 UTC | 2.1md | 7km E of Round Valley, CA 37.410°, -118.521° | 5.2 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 7km E of Round Valley, CA at 21:01 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 20:38:10 UTC | 2.4md | 6 km WSW of La Parguera, Puerto Rico 17.954°, -67.102° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2021, worldwide seismic activity registered a magnitude 2.4 earthquake 6 km WSW of La Parguera, Puerto Rico at 20:38 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 13 hours earlier. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 20:30:40 UTC | 2.0ml | 57 km NNW of Nikolski, Alaska 53.440°, -169.094° | 159.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 57 km NNW of Nikolski, Alaska with origin time 20:30 UTC on July 4, 2021. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 20:10:43 UTC | 2.0ml | 42 km ENE of Chignik, Alaska 56.456°, -157.779° | 65.6 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 42 km ENE of Chignik, Alaska at 20:10 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 19:58:58 UTC | 2.0ml | 55 km S of Whites City, New Mexico 31.677°, -104.401° | 6.9 km | - | - | - | ✓ Reviewed | USGS → |
At 19:58 UTC on July 4, 2021, a magnitude 2.0 tremor occurred 55 km S of Whites City, New Mexico. Coming 1 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 19:53:30 UTC | 3.0ml | 107 km SSE of Sand Point, Alaska 54.470°, -159.776° | 22.1 km | - | - | - | ✓ Reviewed | USGS → |
July 4, 2021 brought a magnitude 3.0 earthquake 107 km SSE of Sand Point, Alaska, logged at 19:53 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 19:45:41 UTC | 2.1md | 4 km ESE of P?hala, Hawaii 19.180°, -155.439° | 33.2 km | - | - | - | Auto | USGS → |
July 4, 2021 brought a magnitude 2.1 earthquake 4 km ESE of P?hala, Hawaii, logged at 19:45 UTC. It arrived roughly 5 hours after a larger magnitude 2.8 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. | ||||||||
2021-07-04 2021-07-04 19:20:48 UTC | 4.1mb | 242 km SE of Sarangani, Philippines 3.639°, 126.763° | 45.9 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2021, worldwide seismic activity registered a magnitude 4.1 earthquake 242 km SE of Sarangani, Philippines at 19:20 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 19:15:05 UTC | 2.5ml | 152 km SSE of Sand Point, Alaska 54.082°, -159.552° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2021 at 19:15 UTC, a magnitude 2.5 earthquake struck 152 km SSE of Sand Point, Alaska. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 17 hours earlier. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-07-04 2021-07-04 19:05:22 UTC | 3.9mb | 117 km SW of Adak, Alaska 51.245°, -178.001° | 42.1 km | - | II | - | ✓ Reviewed | USGS → |
A magnitude 3.9 seismic event took place 117 km SW of Adak, Alaska on July 4, 2021 at 19:05 UTC. The event was offshore. See the M3.9 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 4, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.