What was so unusual about the Honshu earthquake?
Because the plate boundary and subduction zone in the area of the Honshu rupture is not very straight, it is unusual for the magnitude of its earthquake to exceed 8.5 Mw; the magnitude of this earthquake was a surprise to some seismologists. Analysis showed that this earthquake consisted of a set of three events.
Where is Honshu?
Japan
Honshu, largest of the four main islands of Japan, lying between the Pacific Ocean (east) and the Sea of Japan (west). It forms a northeast–southwest arc extending about 800 miles (1,287 km) and varies greatly in width. The coastline extends 6,266 miles (10,084 km).
How high do you have to be to be safe from a tsunami?
100 feet
Pick shelters 100 feet or more above sea level, or at least one mile inland.
How long after an earthquake does a tsunami hit?
As the estimated time of the tsunami waves to reach the coast is 30 minutes after the earthquake, the community should go to the vertical or horizontal evacuation in less than 30 minutes. In an evacuation, the city frequently does the evacuation after obtaining official directions from the authorities.
When was the tsunami in Japan in 2011?
Amateur radio operators throughout Hawaii responded to the tsunami caused by the magnitude 8.9 earthquake off of Honshu, Japan that occured on March 10, 2011, 7:46 pm HST. Activities are chronicled here. It’s not a question of “If”, it’s a question of “When”.
What was the cost of the tsunami in Japan?
The costs resulting from the earthquake and tsunami in Japan alone were estimated at $220 billion USD. The damage makes the 2011 Great East Japan earthquake and tsunami the most expensive natural disaster in history. Although the majority of the tsunami’s impact was in Japan, the event was truly global.
Where was the epicentre of the tsunami in Japan?
The earthquake and tsunami. The magnitude-9.0 earthquake struck at 2:46 pm. (The early estimate of magnitude 8.9 was later revised upward.) The epicentre was located some 80 miles (130 km) east of the city of Sendai, Miyagi prefecture, and the focus occurred at a depth of 18.6 miles (about 30 km) below the floor of the western Pacific Ocean.
How tall are the tsunami waves in Hawaii?
The tsunami raced outward from the epicentre at speeds that approached about 500 miles (800 km) per hour. It generated waves 11 to 12 feet (3.3 to 3.6 metres) high along the coasts of Kauai and Hawaii in the Hawaiian Islands chain and 5-foot (1.5-metre) waves along the island of Shemya in the Aleutian Islands chain.