Tōhoku earthquake and tsunami, 2011
An offshore earthquake generated a tsunami that affected a long coastal stretch. Coastal inundation and earthquake shaking are different hazards with different footprints.
The USGS event record now reports magnitude 9.1. Early reports used 9.0; a revision should be recorded rather than treated as a separate event.
Saved on this browser. An example’s listed role does not certify that it covers every specification dimension.
Evidence and its scope
| Claim | Period and scope | Source |
|---|---|---|
| The preferred USGS event magnitude is 9.1. | 11 March 2011 | Open source |
Possible requirement roles
- A tectonic hazard eventName and date the event.; Separate the tectonic process from exposure and vulnerability.; Use contrasting examples where your specification requires them.