The 7.6 magnitude earthquake registered this Friday in Panama has focused attention on the possible consequences of the seismic movement for other countries in the region, especially Costa Rica, Colombia, and Ecuador, which also have coastlines on the Pacific Ocean.
A tsunami can propagate hundreds or thousands of kilometers from its origin if the earthquake causes a sufficient displacement of the seabed. However, not all large magnitude earthquakes generate tsunamis, nor do all coastlines receive waves of the same height.
Costa Rica and Colombia, watching the evolution of the Pacific
Due to their geographical proximity to Panama, the Pacific coasts of Costa Rica and Colombia are two of the territories that must be considered when evaluating the propagation of a possible tsunami.
The direction of the waves, the ocean depth, and the characteristics of each coastline condition their behavior. Therefore, proximity to the epicenter is not enough to establish which localities could be affected.
The inclusion of a country in a regional risk assessment does not necessarily imply that all its beaches are under an evacuation order. Protective measures correspond to their national authorities.
Can it reach Ecuador?
Ecuador also has an open coastline to the Pacific and has monitoring systems for possible tsunamis.
From a physical point of view, the waves generated by a displacement of the seabed can travel great distances. However, to determine if there is a concrete threat to Ecuador, it is necessary to analyze the official bulletins and sea level measurements.
An arrival time or wave height for its coasts cannot be established solely based on the magnitude of the earthquake.
What to do in the event of a tsunami alert
Authorities recommend leaving low coastal areas when there is an evacuation order and moving to higher places or away from the sea.
Natural signals such as an intense or prolonged seismic shaking, a sudden withdrawal of water, or unusual noise coming from the ocean should also be considered.
The first wave is not always the largest and the danger can last for several hours, so one should not return to the coast until emergency agencies authorize it.