Earthquakes on February 8, 2026
320
EARTHQUAKES on February 8, 2026
24-hour UTC period · USGS data
22 km deep · 73 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
34
M3.0–3.9
40
M2.0–2.9
68
M1.0–1.9
175
Activity Summary
320
Total earthquakes
~250
Daily average
Elevated
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.7
8 km NNE of Santa María Colotepec, Mexico
21:42 UTC · 22.0 km deep
Felt by 73
5.7
79 km ENE of La Tirana, Chile
16:23 UTC · 114.0 km deep
Felt by 25
5.5
42 km SSW of Maisí, Cuba
12:00 UTC · 10.0 km deep
Felt by 14
4.8
76 km NE of Finschhafen, Papua New Guinea
15:16 UTC · 105.8 km deep
4.7
55 km S of Kangding, China
06:06 UTC · 10.0 km deep
Felt by 1
4.7
224 km NNW of Maintirano, Madagascar
02:32 UTC · 10.0 km deep
4.7
14 km SW of Tungor, Russia
00:06 UTC · 10.0 km deep
4.6
30 km S of Shikotan, Russia
16:50 UTC · 68.5 km deep
Earthquake Map — February 8, 2026

All Earthquakes — February 8, 2026
Showing 30 of 145 (filtered from 320)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-02-08 2026-02-08 23:55:58 UTC | 2.1ml | 7 km ENE of Calumet, Oklahoma 35.619°, -98.035° | 5.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 7 km ENE of Calumet, Oklahoma on February 8, 2026 at 23:55 UTC. This was a shallow crustal earthquake, focused at 5.9 km depth. Coordinates: 35.619°, -98.035°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 23:55:31 UTC | 2.8ml | 113 km SSE of Akhiok, Alaska 56.030°, -153.353° | 5.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 113 km SSE of Akhiok, Alaska at 23:55 UTC on February 8, 2026. This event falls inside the aftershock decay of a nearby magnitude 3.9 earthquake that occurred about 3 hours earlier. At a depth of 5.3 km, the event was shallow crustal. Geolocation places the event at 56.030°N, -153.353°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 23:31:35 UTC | 3.7md | 125 km NNE of Cruz Bay, U.S. Virgin Islands 19.337°, -64.238° | 28.0 km | - | - | - | ✓ Reviewed | USGS → |
February 8, 2026 brought a magnitude 3.7 earthquake 125 km NNE of Cruz Bay, U.S. Virgin Islands, logged at 23:31 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.7 earthquake that occurred about 3 hours earlier. At a depth of 28.0 km, the event was shallow crustal. Geolocation places the event at 19.337°N, -64.238°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 23:17:22 UTC | 4.2mb | 43 km ESE of Calama, Chile -22.583°, -68.528° | 118.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 43 km ESE of Calama, Chile on February 8, 2026, with origin time 23:17 UTC. The event originated approximately 118.1 km below the surface, classifying it as intermediate depth. Coordinates: -22.583°, -68.528°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 22:45:07 UTC | 2.9ml | 2 km ESE of Pāhala, Hawaii 19.198°, -155.459° | -0.3 km | - | - | - | ✓ Reviewed | USGS → |
At 22:45 UTC on February 8, 2026, a magnitude 2.9 tremor occurred 2 km ESE of Pāhala, Hawaii. It arrived roughly 19 hours after a larger magnitude 3.1 mainshock in the same 20 km area, placing it within the typical aftershock window. At a depth of just -0.3 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The epicenter is at 19.198°, -155.459°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 22:36:57 UTC | 3.1md | 105 km NNE of Cruz Bay, U.S. Virgin Islands 19.184°, -64.339° | 35.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.1 earthquake 105 km NNE of Cruz Bay, U.S. Virgin Islands came in on February 8, 2026 at 22:36 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 5 hours earlier. This was a shallow crustal earthquake, focused at 35.9 km depth. Geolocation places the event at 19.184°N, -64.339°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 22:16:14 UTC | 3.1md | 101 km NNE of Cruz Bay, U.S. Virgin Islands 19.146°, -64.347° | 45.0 km | - | - | - | ✓ Reviewed | USGS → |
On February 8, 2026, worldwide seismic activity registered a magnitude 3.1 earthquake 101 km NNE of Cruz Bay, U.S. Virgin Islands at 22:16 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 4 hours earlier. At a depth of 45.0 km, the event was shallow crustal. Geolocation places the event at 19.146°N, -64.347°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 22:10:45 UTC | 3.1md | 97 km NE of Cruz Bay, U.S. Virgin Islands 19.066°, -64.276° | 55.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 earthquake was recorded 97 km NE of Cruz Bay, U.S. Virgin Islands on February 8, 2026 at 22:10 UTC. Coming 4 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This was a shallow crustal earthquake, focused at 55.7 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 19.066°, -64.276°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 22:07:48 UTC | 3.3ml | 18 km ESE of Wright, Wyoming 43.710°, -105.267° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.3 earthquake 18 km ESE of Wright, Wyoming with origin time 22:07 UTC on February 8, 2026. At a depth of just 0.0 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. Coordinates: 43.710°, -105.267°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 21:55:50 UTC | 2.2ml | 102 km SSE of Sand Point, Alaska 54.505°, -159.807° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 102 km SSE of Sand Point, Alaska with origin time 21:55 UTC on February 8, 2026. Coming 3 hours after a magnitude 2.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event originated approximately 35.0 km below the surface, classifying it as shallow crustal. Coordinates: 54.505°, -159.807°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 21:45:15 UTC | 4.5mb | 19 km NE of Honchō, Japan 42.267°, 143.054° | 60.5 km | - | - | - | ✓ Reviewed | USGS → |
On February 8, 2026, worldwide seismic activity registered a magnitude 4.5 earthquake 19 km NE of Honchō, Japan at 21:45 UTC. At a depth of 60.5 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 42.267°N, 143.054°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 21:42:09 UTC | 5.7mww | 8 km NNE of Santa María Colotepec, Mexico 15.969°, -96.921° | 22.0 km | 73 | IV | green | ✓ Reviewed | USGS → |
On February 8, 2026 at 21:42 UTC, a magnitude 5.7 earthquake struck 8 km NNE of Santa María Colotepec, Mexico. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on February 8, 2026. 73 people reported feeling the earthquake via the USGS Did You Feel It? system. Maximum shaking intensity peaked at MMI 4.8 (moderate). The hypocenter lay at 22.0 km, placing this in the shallow crustal category. The epicenter is at 15.969°, -96.921°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M5.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 21:28:50 UTC | 2.0ml | 52 km W of Karluk, Alaska 57.618°, -155.336° | 2.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 52 km W of Karluk, Alaska on February 8, 2026 at 21:28 UTC. At a depth of just 2.2 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 57.618°, -155.336°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 21:18:40 UTC | 3.8md | 100 km NNE of Cruz Bay, U.S. Virgin Islands 19.160°, -64.399° | 24.0 km | - | - | - | ✓ Reviewed | USGS → |
On February 8, 2026, worldwide seismic activity registered a magnitude 3.8 earthquake 100 km NNE of Cruz Bay, U.S. Virgin Islands at 21:18 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 3 hours earlier. This was a shallow crustal earthquake, focused at 24.0 km depth. Geolocation places the event at 19.160°N, -64.399°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 21:11:18 UTC | 3.2md | 114 km NNE of Cruz Bay, U.S. Virgin Islands 19.253°, -64.291° | 29.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.2 event was detected 114 km NNE of Cruz Bay, U.S. Virgin Islands on February 8, 2026, with origin time 21:11 UTC. It arrived roughly 3 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event originated approximately 29.8 km below the surface, classifying it as shallow crustal. The epicenter is at 19.253°, -64.291°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 21:00:10 UTC | 3.3md | 105 km NNE of Cruz Bay, U.S. Virgin Islands 19.186°, -64.348° | 29.7 km | - | - | - | ✓ Reviewed | USGS → |
On February 8, 2026, worldwide seismic activity registered a magnitude 3.3 earthquake 105 km NNE of Cruz Bay, U.S. Virgin Islands at 21:00 UTC. It arrived roughly 3 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. This was a shallow crustal earthquake, focused at 29.7 km depth. The epicenter is at 19.186°, -64.348°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:47:53 UTC | 3.1md | 99 km NNE of Cruz Bay, U.S. Virgin Islands 19.156°, -64.417° | 13.8 km | - | - | - | ✓ Reviewed | USGS → |
At 20:47 UTC on February 8, 2026, a magnitude 3.1 tremor occurred 99 km NNE of Cruz Bay, U.S. Virgin Islands. Coming 3 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event originated approximately 13.8 km below the surface, classifying it as shallow crustal. Coordinates: 19.156°, -64.417°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:47:42 UTC | 3.4ml | 121 km SSE of Akhiok, Alaska 55.968°, -153.279° | 6.0 km | - | I | - | ✓ Reviewed | USGS → |
A magnitude 3.4 seismic event took place 121 km SSE of Akhiok, Alaska on February 8, 2026 at 20:47 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.9 earthquake that occurred about 1 hours earlier. On the Modified Mercalli scale, shaking reached 1.4 — considered weak. The event originated approximately 6.0 km below the surface, classifying it as shallow crustal. Geolocation places the event at 55.968°N, -153.279°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:45:28 UTC | 3.9ml | 120 km SSE of Akhiok, Alaska 55.986°, -153.271° | 7.9 km | - | II | - | ✓ Reviewed | USGS → |
A magnitude 3.9 seismic event took place 120 km SSE of Akhiok, Alaska on February 8, 2026 at 20:45 UTC. Peak ground motion corresponded to MMI 2.3, classified as weak shaking. The event originated approximately 7.9 km below the surface, classifying it as shallow crustal. Coordinates: 55.986°, -153.271°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:43:00 UTC | 3.8md | 104 km NNE of Cruz Bay, U.S. Virgin Islands 19.174°, -64.353° | 32.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.8 earthquake 104 km NNE of Cruz Bay, U.S. Virgin Islands with origin time 20:43 UTC on February 8, 2026. It arrived roughly 3 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event originated approximately 32.0 km below the surface, classifying it as shallow crustal. The epicenter is at 19.174°, -64.353°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:37:45 UTC | 3.9ml | 122 km SSE of Akhiok, Alaska 55.964°, -153.264° | 10.5 km | - | II | - | ✓ Reviewed | USGS → |
February 8, 2026 brought a magnitude 3.9 earthquake 122 km SSE of Akhiok, Alaska, logged at 20:37 UTC. Maximum shaking intensity peaked at MMI 2.2 (weak). This was a shallow crustal earthquake, focused at 10.5 km depth. The epicenter is at 55.964°, -153.264°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:36:16 UTC | 3.8ml | 120 km SSE of Akhiok, Alaska 55.979°, -153.290° | 7.2 km | - | II | - | ✓ Reviewed | USGS → |
A magnitude 3.8 earthquake was recorded 120 km SSE of Akhiok, Alaska on February 8, 2026 at 20:36 UTC. Peak ground motion corresponded to MMI 2.1, classified as weak shaking. At a depth of 7.2 km, the event was shallow crustal. Coordinates: 55.979°, -153.290°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:34:13 UTC | 3.7md | 122 km NNE of Cruz Bay, U.S. Virgin Islands 19.367°, -64.389° | 30.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.7 earthquake 122 km NNE of Cruz Bay, U.S. Virgin Islands came in on February 8, 2026 at 20:34 UTC. Coming 7 hours after a magnitude 3.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This was a shallow crustal earthquake, focused at 30.0 km depth. Coordinates: 19.367°, -64.389°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:12:39 UTC | 3.6md | 95 km NNE of Cruz Bay, U.S. Virgin Islands 19.117°, -64.416° | 38.0 km | - | - | - | ✓ Reviewed | USGS → |
On February 8, 2026 at 20:12 UTC, a magnitude 3.6 earthquake struck 95 km NNE of Cruz Bay, U.S. Virgin Islands. Coming 2 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event originated approximately 38.0 km below the surface, classifying it as shallow crustal. Coordinates: 19.117°, -64.416°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:08:14 UTC | 2.9ml | 71 km N of Cruz Bay, U.S. Virgin Islands 18.967°, -64.674° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 71 km N of Cruz Bay, U.S. Virgin Islands on February 8, 2026 at 20:08 UTC. It arrived roughly 18 hours after a larger magnitude 3.4 mainshock in the same 20 km area, placing it within the typical aftershock window. At a depth of 35.0 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 18.967°, -64.674°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 20:04:43 UTC | 2.3ml | 26 km SSE of Chignik, Alaska 56.077°, -158.235° | 65.4 km | - | - | - | ✓ Reviewed | USGS → |
On February 8, 2026 at 20:04 UTC, a magnitude 2.3 earthquake struck 26 km SSE of Chignik, Alaska. The event originated approximately 65.4 km below the surface, classifying it as shallow crustal. Coordinates: 56.077°, -158.235°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 19:55:40 UTC | 3.9md | 98 km NNE of Cruz Bay, U.S. Virgin Islands 19.143°, -64.423° | 24.0 km | - | - | - | ✓ Reviewed | USGS → |
On February 8, 2026 at 19:55 UTC, a magnitude 3.9 earthquake struck 98 km NNE of Cruz Bay, U.S. Virgin Islands. This event falls inside the aftershock decay of a nearby magnitude 4.0 earthquake that occurred about 2 hours earlier. The hypocenter lay at 24.0 km, placing this in the shallow crustal category. Geolocation places the event at 19.143°N, -64.423°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 19:49:42 UTC | 2.0ml | 32 km WSW of Raton, New Mexico 36.795°, -104.782° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
February 8, 2026 brought a magnitude 2.0 earthquake 32 km WSW of Raton, New Mexico, logged at 19:49 UTC. This was a shallow crustal earthquake, focused at 5.0 km depth. Geolocation places the event at 36.795°N, -104.782°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 19:47:15 UTC | 3.1md | 86 km NNE of Cruz Bay, U.S. Virgin Islands 19.015°, -64.392° | 53.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 seismic event took place 86 km NNE of Cruz Bay, U.S. Virgin Islands on February 8, 2026 at 19:47 UTC. Coming 2 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The hypocenter lay at 53.2 km, placing this in the shallow crustal category. Coordinates: 19.015°, -64.392°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-02-08 2026-02-08 19:41:09 UTC | 4.2mb | 25 km WSW of Ashkāsham, Afghanistan 36.588°, 71.270° | 102.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.2 earthquake 25 km WSW of Ashkāsham, Afghanistan came in on February 8, 2026 at 19:41 UTC. This was a intermediate depth earthquake, focused at 102.0 km depth. The epicenter is at 36.588°, 71.270°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.2 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 February 8, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.