Analysis:

Mainly in the area where several major geological plates meet.

1. Pacific Rim volcanic belt: basically consistent with the earthquake belt, from the west coast of North and South America, Alaska, Aleutian Islands, kamchatka peninsula, Japanese Islands, Philippine Islands to New Zealand. There are more than 300 active volcanoes in this area, accounting for nearly 80% of the global active volcanoes, including 100 on the west coast of South America and Central America and the West Indies. There are more than 90 in Alaska, Aleutian Islands, kamchatka peninsula and Japanese Islands. There are about 200 volcanoes in the western Pacific and southwest Pacific, including 90 in Indonesia, making it the country with the most volcanoes in the world. For example, Japanese, Philippine and Chilean volcanoes erupted in 199 1 year, and the volcanoes in eastern China all belong to this zone.

2. The Mediterranean-Himalayan volcanic seismic belt includes southern Europe, the coast of North Africa, western Asia, central Asia, northwestern and southwestern China, northern India, western zhina Peninsula in India and Malay Archipelago.

3. mid-ridge volcanic seismic belt, including mid-Atlantic ridge, mid-Indian ridge, eastern Pacific uplift (mound) and other places.

4. Continental Rift Volcano Seismic Belt, mainly refers to the East African Rift Belt, which starts from the lower reaches of Zambezi River in the south, passes through East African Plateau, Ethiopian Plateau and Red Sea in the north, and reaches the Dead Sea and Jordan Valley.

The Pacific Rim volcanic seismic belt is the largest volcanic seismic belt in the world, accounting for half of the world volcanic seismic belt. Volcanic activity or earthquakes often occur, and the energy released by earthquakes accounts for about four-fifths of the total energy of earthquakes in the world. Earthquakes in North China and Northeast China are also related to crustal activities in this area.