Wikipedia
Virrat is a town and municipality of Finland.
It is part of the Pirkanmaa region. The town has a population of and covers an area of of which is water. The population density is . Apart from the town of Virrat itself, the administratively defined municipality is largely rural, and includes the villages of Äijänneva, Härkönen Jäähdyspohja, Killinkoski, Koro, Kotala, Kurjenkylä, Liedenpohja, Ohtola, Vaskuu and Vaskivesi.
The municipality is unilingually Finnish. Virrat crater on Mars is named after it.
The town grew rapidly in the middle years of the twentieth century, and by 1950 the population reached more than 12,000. Virrat acquired town status in 1977, although it had received the right to hold markets three years earlier, in 1974. More recently the population level has been adversely impacted by the drift of employment opportunities and people to the larger towns.
Major lakes in the area are Toisvesi, beside which the town of Virrat is located, and Tarjanne at the border of the municipalities of Virrat, Mänttä-Vilppula and Ruovesi.
Virrat is a Martian impact crater, approximately 54 kilometres in diameter. It is located at 31.1°S, 103°W, southwest of the crater Dinorwic and northeast of Clantas Fossae. Several Virrat crater radii to the north are the craters Koga and Nhill. It is named after a town in Finland, and its name was approved by the International Astronomical Union in 1991. According to a surface age map of Mars based on US Geological Survey data, the area around Virrat is from the Noachian epoch, which places the area's age at 3.8 to 3.5 billion years ago. At the highest point on its rim, it is about 6,400 metres above zero altitude, and it is about 5,100 metres at the crater bottom, giving it a depth of 1.3 kilometres.