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A seismogram recorded in Massachusetts, United States. The magnitude 9.1 (M w) undersea megathrust earthquake occurred on 11 March 2011 at 14:46 JST (05:46 UTC) in the north-western Pacific Ocean at a relatively shallow depth of 32 km (20 mi), [9] [56] with its epicenter approximately 72 km (45 mi) east of the Oshika Peninsula of Tōhoku, Japan, lasting approximately six minutes.
The United States Geological Survey reported a magnitude (M ww ) of 7.1, at a depth of 25 km (16 mi) and a maximum Modified Mercalli intensity of VII (Very Strong). [2] At least ten aftershocks were recorded following the event, with the strongest measuring M w 5.3.
The 1 January 2024 mainshock was the strongest to hit the peninsula since records began in 1885. [ 15] The swarm began in December 2020 at depths greater than 15 km (9.3 mi) beneath the peninsula's northeast. By mid-March 2021, the earthquake swarm migrated to shallower depths above 15 km (9.3 mi).
Following are some major Japanese quakes in the last 30 years: - On Jan. 16, 1995, an earthquake with a magnitude of 7.3 hit central Japan, devastating the western port city of Kobe. The worst ...
On the face of it, the earthquake that struck southern Japan on Thursday was not a big deal. The magnitude 7.1 quake did little damage and the tsunami warning was quickly scaled back.
The largest earthquake ever recorded was a magnitude 9.5 on May 22, 1960 in Chile on a fault that is almost 1,000 miles long. THE POTENTIAL DAMAGE FROM NANKAI TROUGH QUAKE AND TSUNAMI
The largest megathrust event within the last 20 years was the magnitude 9.0–9.1 Tōhoku earthquake along the Japan Trench megathrust. [ 20 ] In North America, the Juan de Fuca Plate subducts under the North American Plate , creating the Cascadia subduction zone from mid Vancouver Island, British Columbia down to Northern California.
A magnitude 9.0 earthquake and subsequent tsunami in March 2011 devastated large areas along Japan's northeastern coast, killing nearly 20,000 people and triggering the Fukushima Daiichi nuclear ...