area. It extends along the eastern coast of the North Island, from the base of the Coromandel Peninsula in the west to Cape Runaway in the east. The region extends 12 nautical miles from the mainland coastline, and also extends from the coastlines of several islands in the bay, notably Mayor Island/Tuhua, Motiti Island, Whale Island and the active volcano of Whakaari/White Island. It extends inland to the sparsely populated forest lands around Rotorua and Murupara. The region has more than of lakes, known as the Lakes of Rotorua. Much of the central part of the region lies within the Taupo Volcanic Zone, which extends from the centre of the North Island northwards to Whakaari/White Island. Volcanic mountains and lakes, geothermal areas and geological fault lines all dot the landscape. The geothermal region around Rotorua is a major tourist site, while many hot springs in the region are used as swimming areas. The geothermal field near Kawerau is the site of a geothermal power plant that will reportedly meet up to one third of residential and industrial electricity demand in the Eastern Bay of Plenty. Whakaari/White Island, the site of a former sulfur-mining operation, is an active volcanic island popular with tourists. The eruption of Mount Tarawera in 1886 and the 1987 Edgecumbe earthquake were two disasters related to geological activity in the volcanic plateau. Prominent volcanic cones in the region include Mount Maunganui, Mount Tarawera and Mount Edgecumbe/Putauaki. These features also have cultural significance to local Māori. The Kaimai and Mamaku mountain ranges lie at the western border of the region. Swamp land was formerly concentrated around a number of rivers, but much of this was dredged in the early part of the 20th century to increase land for settlement and other uses. Large native and foreign (planted) forest areas are found in the inland parts of the region. The Kaingaroa Forest is the world's largest planted forest, comprising radiata pine mainly used for timber. Climate The Bay of Plenty Region has warm, humid summers and mild winters. It is one of the warmest regions in New Zealand, particularly along the coastline, and most areas experience at least 2,200 hours of sunshine per annum. Average daily maximum temperatures range from in winter and in summer. Typical minima vary from in winter and during summer. Rainfall occurs more frequently in winter than in summer, but tropical storms in summer and