how long did it take for the tohoku tsunami to arrive
2011 Tōhoku earthquake and tsunami The earthquake took place at 14:46 JST (UTC 05:46) around 67 km (42 mi) from the nearest point on Japan's coastline, and initial estimates indicated the tsunami would have taken 10 to 30 minutes to reach the areas first affected, and then areas farther north and south based on the geography of the coastline.[127][128] Just over an hour after the earthquake at 15:55 JST, a tsunami was observed flooding Sendai Airport, which is located near the coast of Miyagi Prefecture,[129][130] with waves sweeping away cars and planes and flooding various buildings as they traveled inland.[131][132] The impact of the tsunami in and around Sendai Airport was filmed by an NHK News helicopter, showing a number of vehicles on local roads trying to escape the approaching wave and being engulfed by it.[133] A 4-metre-high (13 ft) tsunami hit Iwate Prefecture.[134] Wakabayashi Ward in Sendai was also particularly hard hit.[135] At least 101 designated tsunami evacuation sites were hit by the wave.[136]
1 + 2 + 3 + 4 + ⋯ which increases without bound as n goes to infinity. Because the sequence of partial sums fails to converge to a finite limit, the series does not have a sum.
Alonso Álvarez de Pineda
2004 Indian Ocean earthquake and tsunami Because of the distances involved, the tsunami took anywhere from fifteen minutes to seven hours to reach the coastlines.[46][47] The northern regions of the Indonesian island of Sumatra were hit very quickly, while Sri Lanka and the east coast of India were hit roughly 90Â minutes to two hours later. Thailand was struck about two hours later despite being closer to the epicentre, because the tsunami traveled more slowly in the shallow Andaman Sea off its western coast.