A few minutes. Not long. Most of it depends on how strong the quake was that caused the tsunami and how far out it is from land.
In the context of a natural disaster event, the earthquake typically occurs before the tsunami. This is because the earthquake generates the seismic waves that trigger the tsunami as a series of powerful ocean waves.
When a tsunami approaches, the beach area may experience a sudden and dramatic recession of the water, exposing the seabed. As the tsunami wave comes ashore, it can inundate the beach with a powerful surge of water, causing flooding and destruction to coastal infrastructure.
The first communication that can happen regarding in surviving a tsunami would be to warn the public allowing them enough time to allow them to escape to higher ground.Prior to that, there should be ongoing communication educating about preparing emergency plans in the event there is a tsunami. The time to figure out what evacuation route to take, supplies to grab, where the family will meet after an event, etc. is not during the emergency.If communication systems are still in place after a tsunami hits, they might help a rescue team find you.
The earthquake was first and caused the tsunami, like when you throw a stone into a pond first and then the ripples go out.
Do you mean the first wave of the recent Japanese tsunami? If so, the first wave struck late on Thursday night.
The prophesy said that the first ashore would be the first to die; he did so, but killed four men before Hector killed him.
James Cook only ever came ashore at Botany Bay.
1971
The effect we now call tsunami has been happening since there have been oceans on the planet Earth (billions of years). There was no "First Tsunami"; the Japanese have been calling the effect 'tsunami' for many centuries.
2004
the first tsunami was in 1001 it was 200m high
In the context of a natural disaster event, the earthquake typically occurs before the tsunami. This is because the earthquake generates the seismic waves that trigger the tsunami as a series of powerful ocean waves.
When a tsunami approaches, the beach area may experience a sudden and dramatic recession of the water, exposing the seabed. As the tsunami wave comes ashore, it can inundate the beach with a powerful surge of water, causing flooding and destruction to coastal infrastructure.
The earthquake was first and caused the tsunami, like when you throw a stone into a pond first and then the ripples go out.
The first communication that can happen regarding in surviving a tsunami would be to warn the public allowing them enough time to allow them to escape to higher ground.Prior to that, there should be ongoing communication educating about preparing emergency plans in the event there is a tsunami. The time to figure out what evacuation route to take, supplies to grab, where the family will meet after an event, etc. is not during the emergency.If communication systems are still in place after a tsunami hits, they might help a rescue team find you.
An undersea landslide, generally caused by a big earthquake along a continental slope, will often cause tsunamis. Tsunamis used to be called "tidal waves", because they were enormous waves that came ashore gradually like the rising tide, rather than like a breaking wave. The terrifying thing about a tsunami is that first the ocean recedes far from shore, and then rolls back in, not really fast but relentlessly, and it KEEPS COMING IN.
It hit Sumatra first, an Indonesian island.