How much is the volcanic eruption center temperature?

Local time on May 3rd, after a volcanic eruption in Hawaii, a mass of ash rose pink. Today let's say the formation of volcanic eruptions and volcanic eruptions at the center of the temperature is how many degrees. Volcanoes are divided into active volcanoes and extinct volcanoes, generally only active volcano eruption. And in China has more than 600 volcanoes, most are extinct volcanoes. Volcanoes form principle is the interior of the earth temperature and density is uneven, mantle convection is formed within the mantle or mantle plume. When high temperature material to rise to the shallow earth, the partial melting due to less pressure. Under the action of external force, the molten material together and formed in the earth's shallow magma capsule. When the pressure is greater than the pressure of formation of the magma sac, magma will break through the earth's crust along the fault or weak place, caused by volcanic eruptions. Still have a kind of interaction, the cause of the volcano is due to the plate in plate subduction belt or collision zone, for example, because of friction to form the local high temperature, some water mineral dehydration also decreased the melting point of the rock, at this time also can form magma capsule, triggering volcanic activity. Volcanic eruption of lava, like fresh liquid steel, red and hot. According to the measurement, the temperature of the magma is in commonly 900 - Between 1200 ℃, the highest can reach 1300 ℃. It flows through the place is a sea of fire, from a distance, like a fiery red tielui. Another kind is a violent explosion, formation volcanic clastic rock. Sometimes magma is not out of the earth's surface, cooling and solidification of different depth in the earth's crust, formation of various sorts of intrusive rocks, such as granite, peridotite diorite.