The 2009 Izu Islands earthquake occurred on August 9, 2009 at 19:55 local time (10:55 UTC) near the Izu Islands

Izu Islands

The are a group of volcanic islands stretching south and east from the Izu Peninsula of Honshū, Japan. Administratively, they form two towns and six villages; all part of Tokyo. The largest is Izu Ōshima, usually called simply Ōshima....

, off the south coast of Honshu

Honshu

is the largest island of Japan. The nation's main island, it is south of Hokkaido across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyushu across the Kanmon Strait...

. The epicenter was 170 km from Hamamatsu and 325 km from Tokyo

Tokyo

, ; officially , is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family...

.

This was an intraplate earthquake within the Pacific Plate

Pacific Plate

The Pacific Plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At 103 million square kilometres, it is the largest tectonic plate....

, which is subducting beneath the Philippine Sea Plate at the Izu-Bonin trench in this region. In Tokyo, the intensity reached shindo 4 (MM IV according to USGS). Due to its depth of 297 km, this earthquake did not cause any damage.