Extent (Local vs. Distant Tsunami)
This map, taken from the Tsunami Evacuation Brochure for Cannon Beach, OR, provides another example of extent. In this example, the extent of the tsunami hazard is different if it is a local tsunami (originating from an earthquake on the Oregon Coast) or a distant tsunami (occurring from an earthquake that is far away from Oregon). The extent is smaller for a distant tsunami than a local one.
Photograph of maps showing extent (local vs distant Tsunami). The map on the left shows Tsunami Evacuation Map Cannon Beach, Oregon. The map on the right is a part of the main map. The map looks like a small legend, a person climbing up towards the arrow: Area Assembly. It describes three definitions: (1) Outside Hazard Area: Evaluate to this area for all tsunami warnings or if you feel an earthquake, (2) Local Casadia Earthquake and Tsunami: Evaluation zone for a local tsunami from an earthquake at the Oregon coast. (3) Distant Tsunami: Evaluation zone for distance tsunami from an earthquake far away from the Oregon coast.