OVSICORI-UNA Alerta Terremotos 3.1

OVSICORI-UNA Earthquake Alert, Costa Rica, is a mobile app that receives notifications from the Earthquake Early Warning System (SATT) of OVSICORI and evaluates if they can be felt at the user's location or Points of Interest, providing, ideally, Early Warning so the user has time to take protective action.

Effective only at distances between about 50 to 150 km. Closer than that, there is no time to alert, and farther away, even if the earthquake can be felt, it will not cause significant damage to warrant an alert.

It is a free application and service provided by the National University of Costa Rica as a complement to the information dissemination work carried out by OVSICORI. It is a completely automated system that links multiple instruments and algorithms and is therefore susceptible to technical failures.

The app provides three types of alerts: Red, Orange, and Green.

• Red Alert: This indicates that the earthquake may be felt with intensity on the Modified Mercalli Scale (IMM) greater than or equal to V and that the user has a few seconds to take action to PROTECT themselves. It is notified with VOICE command and vibration.
• Orange Alert: This indicates that the earthquake may be felt with intensity greater than or equal to III but less than V. It is notified with SOUND and vibration.
• Green Alert: This indicates that the earthquake may be felt with intensity less than III. It is silently notified.

For each event, there is an option to report the user's experience of what was perceived or felt during the earthquake.