There’s a serious danger of tidal waves from that size impact (assuming it actually impacted and didn’t do an airburst like Tunguska). So even if it hit an ocean it could be a bad day.
According to Wikipedia, the Japanese tsunami was caused by an Earthquake who’s “surface energy” (which I imagine is what’s relevant for tsunamis) was about 2 orders of magnitude more than the expected 2 megaton impact of this asteroid, so it probably wouldn’t lead to a huge tsunami.
There’s a serious danger of tidal waves from that size impact (assuming it actually impacted and didn’t do an airburst like Tunguska). So even if it hit an ocean it could be a bad day.
According to Wikipedia, the Japanese tsunami was caused by an Earthquake who’s “surface energy” (which I imagine is what’s relevant for tsunamis) was about 2 orders of magnitude more than the expected 2 megaton impact of this asteroid, so it probably wouldn’t lead to a huge tsunami.
Additionally there’d be a much more obvious and earlier warning than for a “conventional” tsunami, allowing more people to reach safety in time.