Thunderbird Bay

Thunderbird Bay (:, Tumkala Chak) is the northern part of the Eastern Ocean, dividing Bangju and the rest of Yeongju.

Names and etymology
By language:
 * (Híilang G̱aw)
 * (Tumkala Chak)
 * (Wilkawinak-si)
 * (Wilkawinak-si)

History
Thunderbird Bay has long been an important cultural and economic crossroads between Yeongju and Sinju, facilitating contact and trade which greatly influenced the development of both regions. Several major civilizations developed on its coast, including the ancient Hachuabshi civilization. The bay also prominently served as the center of the widespread maritime raids of the Pekkou during the middle ages.

During the Age of Sail, the bay became an important hub of mercantile activity. Most trade between Sinju and Yeongju passed through the bay. This period saw the development of a regional pidgin language and known as the, or Wawa.

The bay remained an important area into the modern era, when it became an important front for naval power projection. The Great Eulhae War saw an intense struggle for naval supremacy over the bay. Following the war, the Thunderbird Bay Union was formed to facilitate trade and diplomacy between member states bordering the bay.

Coastal countries
The following countries have a coastline on Thunderbird Bay:


 * Eastern shore (from north to south): Tlakwaan, Atfalati, Yudeok, Muwon, Hachuabsh, Yelamu
 * Western shore (from north to south): Wuyala, Hadala, Hekatsut, Yuluil, Gitsan

Coastal cities

 * Eastern shore (from north to south): Chageipi, Chalaitglit, Učuladi, Túlq, Petlenuk
 * Western shore (from north to south): Namgyen

Plate tectonics
The Thunderbird subduction zone is located beneath Thunderbird Bay, where the Bangju Plate subducts beneath the Yeongju Plate at the XXX Trench. As a consequence the bay is prone to strong undersea earthquakes which produce some of the most destructive tsunamis in history. The 1031 CE Thunderbird Bay tsunami that devastated the ancient P'udilabš Kingdom in Hachuabsh was one such tsunami, caused by a in the subduction zone.