It was discovered pretty much when it happened. After the earthquake that triggered it occurred, authorities knew that a tsunami was likely. It reached parts of the Japanese coast less than an hour later. By then it was fairly obvious that a tsunami was occurring. The event occurred on March 11, 2011.
The Earthquake occurred before the tsunami as it is what caused the tsunami.
It is impossible to predict when a tsunami will happen until it is triggered.
2004
World Cricket Tsunami Appeal happened in 2004.
2012.
The Earthquake occurred before the tsunami as it is what caused the tsunami.
No
an earthquake under the ocean caused the tsunami
It is impossible to predict when a tsunami will happen until it is triggered.
2004
yes it will
yes
In 2004.
It aint gonna happen.
and earhtquake scoring 8.9 on the rictor scale triggered the tsunami
The tsunami was triggered by an earthquake.
tsunami's are huge waves:)