M6.0 Earthquake near Susitna, Alaska — 27 November 2025
A strong earthquake of magnitude 6.0 was recorded near Susitna, Alaska on , with an epicentre 12 km west-northwest of Susitna, at a focal depth of 69.4 km.
Time (UTC): 2025-11-27 17:11:29
Time (your timezone): —
Magnitude: 6.0 (strong)
Focal depth: 69.4 km (shallow)
Epicentre: 61.5695, -150.7510
Location: 12 km WNW of Susitna, Alaska
USGS link to NOAA tsunami information: Available
Review status: Reviewed
Source: USGS event page
How strong was this earthquake?
Strong earthquakes can cause significant damage in populated areas within roughly 100 km of the epicentre, particularly to older masonry buildings. Landslides and liquefaction become a real risk in susceptible ground.
A magnitude 6.0 earthquake radiates roughly 15,080 tons of TNT equivalent in seismic energy.
The USGS assigns this earthquake a significance score of 1124, which meets the USGS threshold of more than 600 for its significant-earthquake list. The ranking combines magnitude with available Did You Feel It responses and PAGER alert level; it is not a direct measurement of damage.
Where was the epicentre?
The epicentre was located at 61.5695, -150.7510 — 12 km west-northwest of Susitna. The closest other recorded event was a magnitude 1.5 earthquake 6 km south of here on 29 July 2026.
Why the 69 km depth matters
At 69 km this was a shallow earthquake. Shallow events release their energy close to the surface, so for a given magnitude they produce noticeably stronger shaking — and more damage — than deeper ones. Roughly three quarters of all earthquakes worldwide occur at shallow depths.
This catalogue does not ingest eyewitness responses, so it cannot confirm where this earthquake was felt. Based on magnitude alone, an event this size can produce strong, widely felt shaking. Its shallow focus makes stronger surface shaking more likely than for a deeper event of the same magnitude.
What does the tsunami information flag mean?
The USGS event record links to NOAA tsunami information because this was a large event in an oceanic region. That link flag does not mean a tsunami occurred or that a warning is active. Check tsunami.gov and instructions from your local authority for the current status of your coastline.
How earthquakes generate tsunamis, and what the alert levels mean →
Aftershocks and local seismic history
116 further earthquakes have been recorded within about 150 km of the epicentre in the seven days after this event, the largest of them magnitude 3.4.
38 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 5.6 event near Susitna on 27 November 2025. This M6.0 event released about 4.7 times more energy than that event.
How long aftershock sequences last, and how large they get →
Where this event sits in the record
This earthquake is part of the November 2025 worldwide record. Browse the full monthly archive to compare periods.
Nearest recorded earthquakes to this epicentre
- M1.5 earthquake near Susitna, Alaska — (6 km S)
- M1.8 earthquake near Susitna, Alaska — (21 km NW)
- M1.5 earthquake near Susitna, Alaska — (22 km SSW)
- M1.5 earthquake near Susitna, Alaska — (24 km E)
- M2.1 earthquake near Beluga, Alaska — (25 km SSW)
- M1.4 earthquake near Beluga, Alaska — (33 km WSW)
- M1.7 earthquake near Willow, Alaska — (38 km NE)
- M1.1 earthquake near Big Lake, Alaska — (44 km ESE)
- M1.9 earthquake near Houston, Alaska — (49 km E)
- M2.2 earthquake near Houston, Alaska — (49 km E)
Other magnitude 6 earthquakes worldwide
- M5.9 earthquake near Colonia, Micronesia —
- M5.8 earthquake near Kermadec Islands region —
- M5.9 earthquake near Kermadec Islands region —
- M5.9 earthquake near Brisas Barra de Suchiate, Mexico —
- M5.8 earthquake near Ust’-Kamchatsk Staryy, Russia —
- M5.8 earthquake near Oula Xiuma, China —
- M5.8 earthquake near Atka, Alaska —
- M5.8 earthquake near Atka, Alaska —
Questions about this earthquake
How strong is a magnitude 6.0 earthquake?
Strong earthquakes can cause significant damage in populated areas within roughly 100 km of the epicentre, particularly to older masonry buildings. Landslides and liquefaction become a real risk in susceptible ground. A magnitude 6.0 earthquake radiates roughly 15,080 tons of TNT equivalent in seismic energy.
How deep was the earthquake near Susitna?
At 69 km this was a shallow earthquake. Shallow events release their energy close to the surface, so for a given magnitude they produce noticeably stronger shaking — and more damage — than deeper ones. Roughly three quarters of all earthquakes worldwide occur at shallow depths.
Was the M6.0 earthquake near Susitna felt?
This catalogue does not ingest eyewitness responses, so it cannot confirm where this earthquake was felt. Based on magnitude alone, an event this size can produce strong, widely felt shaking. Its shallow focus makes stronger surface shaking more likely than for a deeper event of the same magnitude.
What does the USGS tsunami field mean for this event?
The USGS event record links to NOAA tsunami information because this was a large event in an oceanic region. That link flag does not mean a tsunami occurred or that a warning is active. Check tsunami.gov and instructions from your local authority for the current status of your coastline.
Have there been aftershocks?
116 further earthquakes have been recorded within about 150 km of the epicentre in the seven days after this event, the largest of them magnitude 3.4.
How often do earthquakes happen near Susitna?
38 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 5.6 event near Susitna on 27 November 2025. This M6.0 event released about 4.7 times more energy than that event.