From the comparison pictures above, I can see that there is indeed a big difference before and after the earthquake. The seawater surged into the land due to the tsunami, causing a great deal of damage.
In addition to launching a people-finding system for the Japanese earthquake, which is helping Japanese people find their families, Google has now updated the satellite images after the Great Japan Earthquake. This can be considered as a very helpful effort. I hope that the Japanese nation can rally and recover.