Tag Archives: Tsunami Warnings

Ocean Observing Systems (OOS) and Tsunami Warnings

Ocean Observing Systems (OOS) have many sensors. One function is to detect earthquales using seismometers and hydrophones, and tsunamis using bottom pressure recorders.
A massive 8.9 magnitude earthquake hit the Pacific Ocean nearby Northeastern Japan at around 2:46pm on March 11 (JST) causing damage with blackouts, fire and tsunami.
These videos give some background information.