M 4.8 - Southern Alaska
April 27, 2021 at 17:54:36 UTC
Depth: 43.80 km (Shallow)
Key Takeaway
This light earthquake (M4.8) occurred 4 years ago near Southern Alaska, at a depth of 43.80 km (shallow). It was felt by 1,122 people. A tsunami warning was issued for this event.
Light
PAGER Alert
Tsunami
Felt Reports
Event Details
| Magnitude | 4.8 ml |
| Depth | 43.80 km (Shallow) |
| Location | 61.3423N, 149.9799W |
| Community Intensity | IV (Light) |
| Mercalli Intensity | IV (Light) |
| Felt Reports (DYFI) | 1,122 people |
| Alert Level (PAGER) | Green — No fatalities or damage expected |
| Tsunami Warning | Yes |
| Significance | 774 / 3000 |
| Status | Reviewed |
| Network | ak |
| USGS Event Page | View on USGS → |
Frequently Asked Questions
What was the magnitude of this earthquake?
This earthquake had a magnitude of 4.8, classified as "Light". Light earthquakes produce noticeable shaking but rarely cause damage.
How deep was this earthquake?
This earthquake occurred at a depth of 43.80 km, classified as "Shallow". Shallow earthquakes tend to cause more damage at the surface because the energy has less distance to travel before reaching buildings and infrastructure.
Where exactly did this earthquake occur?
This earthquake occurred near Southern Alaska, at coordinates 61.3423N, 149.9799W. The location is determined by analyzing seismic wave arrival times at multiple monitoring stations.
Were there aftershocks associated with this event?
Aftershock data for this specific event can be explored by viewing nearby recent earthquakes listed below on this page. Aftershocks are smaller earthquakes that occur in the same area following a larger event, and they can continue for days, weeks, or even months depending on the original earthquake's magnitude.
What does the magnitude of this earthquake mean in practical terms?
A magnitude 4.8 earthquake is classified as "Light" — these are commonly felt by people indoors but rarely cause any significant damage.
Nearby Recent Earthquakes
More Earthquakes in Southern Alaska
Southern Alaska
2 years ago · 16.10 km deep
Southern Alaska
3 years ago · 12.90 km deep
Southern Alaska
3 years ago · 41.40 km deep
Southern Alaska
3 years ago · 17.60 km deep
Southern Alaska
3 years ago · 71.60 km deep
Southern Alaska
7 years ago · 37.70 km deep
Southern Alaska
8 years ago · 101.70 km deep
Southern Alaska
12 years ago · 9.00 km deep
More M4.0-5.0 Earthquakes
21 km ENE of Sallique, Peru
5 hours ago · 41.95 km deep
16 km SSE of Petropavlovsk-Kamchatsky, Russia
12 hours ago · 79.51 km deep
2 km SSE of Santa María Ixhuatán, Guatemala
13 hours ago · 10.00 km deep
148 km SSE of Vilyuchinsk, Russia
13 hours ago · 35.00 km deep
17 km ESE of Manay, Philippines
15 hours ago · 80.55 km deep
northern Mid-Atlantic Ridge
17 hours ago · 10.00 km deep
61 km SSW of Ashkāsham, Afghanistan
18 hours ago · 101.97 km deep
74 km W of Bandar Abbas, Iran
18 hours ago · 10.00 km deep
Data from the USGS Earthquake Hazards Program (ComCat). QuakeScan is not affiliated with the USGS. Event details may be updated as new data becomes available.