Understanding Tsunami Warnings and Initial Response
Indonesia's tsunami warning system uses international standards and provides warnings to coastal communities within minutes of an earthquake being detected. Warnings can be received via SMS, social media, local sirens, and radio. If you feel a strong earthquake in a coastal area, do not wait for an official warning—begin evacuation immediately to higher ground.
The first step when hearing a tsunami warning is to quickly leave the coastal area and move to higher ground, at least 30 meters above sea level or as far as one kilometer from the shoreline if possible. Use evacuation routes that have been established and marked by local authorities. Do not try to collect valuables—life is the top priority.
The second step is to stay in a safe location until authorities give the all-clear signal to return. Tsunami waves can come repeatedly for several hours after the first wave, so do not return to the coastal area until it is declared completely safe. Prior preparation including knowing evacuation routes, maintaining contact with family members, and conducting regular evacuation drills are key to safety.