Topic
How USGS maps earthquake magnitude to Everbridge severity levels.
Description
Magnitude to Severity Mapping
| Magnitude | Severity | Description |
| 0.0-3.9 | Minor | Minimal to no known threat to life or property - Up to: Often felt by people, but very rarely causes damage. Shaking of indoor objects can be noticeable. |
| 4.0-5.9 | Moderate | Possible threat to life or property - Up to: Can cause damage of varying severity to poorly constructed buildings. Zero to slight damage to all other buildings. Felt by everyone. |
| 6.0-7.9 | Severe | Significant threat to life or property - Up to: Causes damage to most buildings, some to partially or completely collapse or receive severe damage. Well-designed structures are likely to receive damage. Felt across great distances with major damage mostly limited to 250 km from epicenter. |
| 8.0 > | Extreme | Extraordinary threat to life or property - Up to: At or near total destruction |
Alerting
Alerts can be configured to alert on a specific magnitude range.
Alerts can be configured to alert on Severity.
| Note: If you create an alert workflow that has both Magnitude and Severity, both conditions will need to be true to create an Alert. Using both conditions could lead to a missed Alert. It is recommended to use either Magnitude or Severity, in your alert workflows for Earthquakes (USGS). |
Article Feedback
While we can’t respond to you directly, we’d love to know how we can improve the article.
Please sign in to leave a comment.