Earthquakes on April 30, 2021
224
EARTHQUAKES on April 30, 2021
24-hour UTC period · USGS data
LARGEST: M5.3 — Mid-Indian Ridge
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
24
M3.0–3.9
7
M2.0–2.9
48
M1.0–1.9
142
Activity Summary
224
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.3
Mid-Indian Ridge
21:49 UTC · 10.0 km deep
5.2
Kermadec Islands, New Zealand
02:06 UTC · 52.2 km deep
5.0
128 km WSW of Banda Aceh, Indonesia
16:43 UTC · 35.0 km deep
Felt by 2
4.9
142 km SSE of Lata, Solomon Islands
05:18 UTC · 66.9 km deep
4.7
south of Africa
21:35 UTC · 10.0 km deep
4.7
44 km W of Abra Pampa, Argentina
05:04 UTC · 250.0 km deep
Felt by 1
4.5
60 km WSW of Poso, Indonesia
19:50 UTC · 19.0 km deep
4.5
Kermadec Islands region
15:18 UTC · 10.0 km deep
Earthquake Map — April 30, 2021
All Earthquakes — April 30, 2021
Showing 30 of 82 (filtered from 224)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-04-30 2021-04-30 23:53:56 UTC | 2.4md | 13km NW of Pinnacles, CA 36.624°, -121.228° | 5.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 13km NW of Pinnacles, CA on April 30, 2021 at 23:53 UTC. It arrived roughly 21 hours after a larger magnitude 2.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 23:41:32 UTC | 2.1md | 22km ENE of San Lucas, CA 36.236°, -120.806° | 8.6 km | - | - | - | ✓ Reviewed | USGS → |
On April 30, 2021 at 23:41 UTC, a magnitude 2.1 earthquake struck 22km ENE of San Lucas, CA. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 23:10:49 UTC | 2.1ml | 4 km ESE of P?hala, Hawaii 19.195°, -155.440° | 33.5 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.1 earthquake 4 km ESE of P?hala, Hawaii with origin time 23:10 UTC on April 30, 2021. It arrived roughly 8 hours after a larger magnitude 3.2 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. | ||||||||
2021-04-30 2021-04-30 23:10:45 UTC | 4.1mb | 259 km S of Kushiro, Japan 40.679°, 144.956° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 earthquake was recorded 259 km S of Kushiro, Japan on April 30, 2021 at 23:10 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 21:49:38 UTC | 5.3mww | Mid-Indian Ridge -40.808°, 78.529° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 30, 2021 at 21:49 UTC, a magnitude 5.3 earthquake struck near Mid-Indian Ridge. It is the largest earthquake currently listed for worldwide seismic activity on April 30, 2021. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 21:35:43 UTC | 2.6ml | 1km N of Yucaipa, CA 34.045°, -117.046° | 11.5 km | 44 | - | - | ✓ Reviewed | USGS → |
On April 30, 2021 at 21:35 UTC, a magnitude 2.6 earthquake struck 1km N of Yucaipa, CA. 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 M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 21:35:33 UTC | 4.7mb | south of Africa -48.871°, 31.156° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:35 UTC on April 30, 2021, a magnitude 4.7 tremor occurred south of Africa. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 20:55:47 UTC | 2.8ml | 45 km SE of Denali National Park, Alaska 63.277°, -151.029° | 0.1 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.8 earthquake 45 km SE of Denali National Park, Alaska came in on April 30, 2021 at 20:55 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. | ||||||||
2021-04-30 2021-04-30 20:47:33 UTC | 4.4mb | 39 km SSW of Loikaw, Myanmar 19.338°, 97.104° | 15.0 km | 1 | - | - | ✓ Reviewed | USGS → |
April 30, 2021 brought a magnitude 4.4 earthquake 39 km SSW of Loikaw, Myanmar, logged at 20:47 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 20:28:32 UTC | 2.2ml | 44 km SE of Denali National Park, Alaska 63.291°, -151.019° | 0.0 km | - | - | - | Auto | USGS → |
April 30, 2021 brought a magnitude 2.2 earthquake 44 km SE of Denali National Park, Alaska, logged at 20:28 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. | ||||||||
2021-04-30 2021-04-30 20:25:24 UTC | 4.2mb | 222 km ENE of Lospalos, Timor Leste -7.443°, 128.706° | 132.8 km | - | - | - | ✓ Reviewed | USGS → |
April 30, 2021 brought a magnitude 4.2 earthquake 222 km ENE of Lospalos, Timor Leste, logged at 20:25 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 20:06:37 UTC | 4.3mwr | 104 km NNW of La Serena, Chile -29.043°, -71.694° | 34.4 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 104 km NNW of La Serena, Chile at 20:06 UTC on April 30, 2021. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 20:04:54 UTC | 4.1mb | 173 km ENE of Olonkinbyen, Svalbard and Jan Mayen 71.453°, -4.183° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.1 earthquake 173 km ENE of Olonkinbyen, Svalbard and Jan Mayen with origin time 20:04 UTC on April 30, 2021. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 19:58:59 UTC | 2.1ml | 5 km ESE of Ratliff City, Oklahoma 34.427°, -97.455° | 6.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 5 km ESE of Ratliff City, Oklahoma at 19:58 UTC on April 30, 2021. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 19:50:46 UTC | 4.5mb | 60 km WSW of Poso, Indonesia -1.540°, 120.227° | 19.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 60 km WSW of Poso, Indonesia on April 30, 2021, with origin time 19:50 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 19:47:18 UTC | 3.4mb | 94 km SSE of King Cove, Alaska 54.317°, -161.610° | 3.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.4 seismic event took place 94 km SSE of King Cove, Alaska on April 30, 2021 at 19:47 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 18:44:08 UTC | 2.3ml | 48 km SE of Chignik, Alaska 55.935°, -157.959° | 36.0 km | - | - | - | Auto | USGS → |
A magnitude 2.3 earthquake was recorded 48 km SE of Chignik, Alaska on April 30, 2021 at 18:44 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 17:45:42 UTC | 4.4mb | 30 km SE of Owase, Japan 33.878°, 136.442° | 387.5 km | 1 | - | - | ✓ Reviewed | USGS → |
On April 30, 2021 at 17:45 UTC, a magnitude 4.4 earthquake struck 30 km SE of Owase, Japan. 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. | ||||||||
2021-04-30 2021-04-30 17:22:47 UTC | 2.3ml | 43 km SSW of Tanana, Alaska 64.800°, -152.368° | 8.8 km | 1 | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.3 earthquake 43 km SSW of Tanana, Alaska with origin time 17:22 UTC on April 30, 2021. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 1 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 17:21:18 UTC | 3.2ml | 9 km N of Parkville, Minnesota 47.616°, -92.593° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.2 earthquake was recorded 9 km N of Parkville, Minnesota on April 30, 2021 at 17:21 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. | ||||||||
2021-04-30 2021-04-30 17:19:24 UTC | 4.3ml | 40 km SSW of Tanana, Alaska 64.830°, -152.396° | 19.4 km | 6 | V | green | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 40 km SSW of Tanana, Alaska on April 30, 2021, with origin time 17:19 UTC. In the 72 hours after this event, the USGS recorded 6 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 16:43:25 UTC | 5.0mb | 128 km WSW of Banda Aceh, Indonesia 5.311°, 94.193° | 35.0 km | 2 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.0 earthquake 128 km WSW of Banda Aceh, Indonesia with origin time 16:43 UTC on April 30, 2021. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 15:45:34 UTC | 4.4mb | Pagan region, Northern Mariana Islands 18.097°, 145.840° | 203.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded in the Pagan region, Northern Mariana Islands on April 30, 2021 at 15:45 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 15:33:46 UTC | 3.2ml | Island of Hawaii, Hawaii 19.201°, -155.540° | 0.6 km | 1 | - | - | ✓ Reviewed | USGS → |
On April 30, 2021 at 15:33 UTC, a magnitude 3.2 earthquake struck near Island of Hawaii, Hawaii. In the 72 hours after this event, the USGS recorded 8 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 15:33:46 UTC | 3.0ml | 5 km WSW of P?hala, Hawaii 19.190°, -155.530° | -0.4 km | 4 | - | - | Auto | USGS → |
At 15:33 UTC on April 30, 2021, a magnitude 3.0 tremor occurred 5 km WSW of P?hala, Hawaii. In the 72 hours after this event, the USGS recorded 8 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 15:18:35 UTC | 4.5mb | Kermadec Islands region -29.847°, -176.624° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake in the Kermadec Islands region came in on April 30, 2021 at 15:18 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 15:17:51 UTC | 2.0md | 2 km E of P?hala, Hawaii 19.206°, -155.451° | 32.8 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.0 earthquake 2 km E of P?hala, Hawaii at 15:17 UTC on April 30, 2021. It arrived roughly 6 hours after a larger magnitude 2.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 15:15:34 UTC | 3.8mb | 56 km NE of Adak, Alaska 52.289°, -176.149° | 155.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.8 earthquake 56 km NE of Adak, Alaska came in on April 30, 2021 at 15:15 UTC. The event was offshore. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 15:14:09 UTC | 2.2ml | 2 km E of P?hala, Hawaii 19.202°, -155.457° | 34.1 km | - | - | - | Auto | USGS → |
On April 30, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 2 km E of P?hala, Hawaii at 15:14 UTC. It arrived roughly 6 hours after a larger magnitude 2.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-30 2021-04-30 15:12:47 UTC | 2.0ml | 2 km ENE of P?hala, Hawaii 19.214°, -155.459° | 33.6 km | - | - | - | Auto | USGS → |
This magnitude 2.0 event was detected 2 km ENE of P?hala, Hawaii on April 30, 2021, with origin time 15:12 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.2 earthquake that occurred about 6 hours earlier. 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 April 30, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.