GEOLOGY

Detailed explanation-1: -The magnitude 9.0–9.1 (Mw) undersea megathrust earthquake had an epicenter in the Pacific Ocean, 72 km (45 mi) east of the Oshika Peninsula of the Tōhoku region, and lasted approximately six minutes, causing a tsunami.

Detailed explanation-2: -On March 11, 2011, a magnitude (Mw) 9.1 earthquake struck off the northeast coast of Honshu on the Japan Trench. A tsunami that was generated by the earthquake arrived at the coast within 30 minutes, overtopping seawalls and disabling three nuclear reactors within days.

Detailed explanation-3: -On March 11, 2011, Japan experienced the strongest earthquake in its recorded history. The earthquake struck below the North Pacific, 130 kilometers (81 miles) east of Sendai, the largest city in the Tohoku region, a northern part of the island of Honshu. The Tohoku earthquake caused a tsunami.

Detailed explanation-4: -In March 2011 Japan was struck by a powerful underwater earthquake centered in the Pacific Ocean off the coast of Honshu, the country’s main island. The quake caused widespread damage on land and triggered a series of large tsunami waves that devastated many coastal areas of Japan, most notably northeastern Honshu.

Detailed explanation-5: -A tsunami can be caused by underwater disturbances like earthquakes or landslides under oceans.