felt along a stretch of coastline from Erimo, Hokkaido, in the north to Ōarai, Ibaraki, in the south, with most of the destruction in that area occurring in the hour following the earthquake. Near Ōarai, people captured images of a huge whirlpool that had been generated by the tsunami. The tsunami washed away the sole bridge to Miyatojima, Miyagi, isolating the island's 900 residents. A high tsunami hit Chiba Prefecture about 2½ hours after the quake, causing heavy damage to cities such as Asahi. On 13 March 2011, the Japan Meteorological Agency (JMA) published details of tsunami observations recorded around the coastline of Japan following the earthquake. These observations included tsunami maximum readings of over at the following locations and times on 11 March 2011, following the earthquake at 14:46 JST: 15:12 JST – off Kamaishi – 15:15 JST – Ōfunato – or higher 15:20 JST – Ishinomaki-shi Ayukawa – or higher 15:21 JST – Miyako – or higher 15:21 JST – Kamaishi – or higher 15:44 JST – Erimo-cho Shoya – 15:50 JST – Sōma – or higher 16:52 JST – Ōarai – Many areas were also affected by waves of in height, and the JMA bulletin also included the caveat that "At some parts of the coasts, tsunamis may be higher than those observed at the observation sites." The timing of the earliest recorded tsunami maximum readings ranged from 15:12 to 15:21, between 26 and 35 minutes after the earthquake had struck. The bulletin also included initial tsunami observation details, as well as more detailed maps for the coastlines affected by the tsunami waves. JMA also reported offshore tsunami height recorded by telemetry from moored GPS wave-height meter buoys as follows: offshore of central Iwate (Miyako) – offshore of northern Iwate (Kuji) – offshore of northern Miyagi (Kesennuma) – On 25 March 2011, Port and Airport Research Institute (PARI) reported tsunami height by visiting the port sites as follows: Port of Hachinohe – Port of Hachinohe area – Port of Kuji – Port of Kamaishi – Port of Ōfunato – Run up height, port of Ōfunato area – Fishery port of Onagawa – Port of Ishinomaki – Shiogama section of Shiogama-Sendai port – Sendai section of Shiogama-Sendai port – Sendai Airport area – The tsunami at Ryōri Bay (), Ōfunato reached a height of (run-up elevation). Fishing equipment was scattered on the high cliff above the bay. At