M 6.3 - Izu Islands, Japan region
August 20, 2002 at 10:59:32 UTC
Depth: 9.00 km (Shallow)
Key Takeaway
This strong earthquake (M6.3) occurred 23 years ago near Izu Islands, Japan region, at a depth of 9.00 km (shallow).
Strong
PAGER Alert
Tsunami
Felt Reports
Event Details
| Magnitude | 6.3 mwb |
| Depth | 9.00 km (Shallow) |
| Location | 30.9860N, 141.9660E |
| Tsunami Warning | No |
| Significance | 611 / 3000 |
| Status | Reviewed |
| Network | us |
| USGS Event Page | View on USGS → |
Frequently Asked Questions
What was the magnitude of this earthquake?
This earthquake had a magnitude of 6.3, classified as "Strong". Strong earthquakes can cause severe damage in areas several tens of miles across.
How deep was this earthquake?
This earthquake occurred at a depth of 9.00 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 Izu Islands, Japan region, at coordinates 30.9860N, 141.9660E. 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 6.3 earthquake is classified as "Strong" — these can cause significant damage in populated areas, particularly to older or poorly constructed buildings.
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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.