How are volcanic eruptions formed? Tell us in your own words how volcanic eruptions are formed.

The temperature and density inside the Earth are uneven, forming mantle convection or mantle plumes inside the mantle. When hot material rises to the shallow parts of the Earth, partial melting occurs due to reduced pressure. Under the influence of external forces, these molten materials come together and form magma pockets in the shallow parts of the Earth. When the pressure in the magma sac is greater than the pressure in the formation, the magma will break through the crust along faults or weak points, causing a volcanic eruption.

Hazards of volcanic eruptions

1. Impact on global climate

The large amounts of volcanic ash and volcanic gas ejected during volcanic eruptions have a great impact on the climate. Because in this case, dark days, violent storms, and even mud rain will plague local residents for months. Volcanic ash and volcanic gases are ejected high into the sky, and they are spread far away by the wind. These volcanic materials block sunlight and cause temperatures to drop. In addition, they also filter out certain wavelengths of light, making the sun and moon look like they are haloed or glowing with strange colors, creating strange natural landscapes especially at sunrise and sunset.

2. Destroy the environment

The combination of large amounts of volcanic ash emitted by volcanic eruptions and heavy rains can form mudslides that can wash away roads and bridges, flood nearby villages and cities, and make countless people homeless. . Mud formed from mud and rock debris can flood entire cities.

Although the rocks were obscured by volcanic ash clouds, you can still see the huge rocks that were ejected into the air when the volcano first erupted.

Benefits of volcanic eruptions

Volcanic eruptions have a profound impact on the natural landscape. Land is the world's most precious resource because it breeds all kinds of plants to support all things. If a volcanic eruption can cover farmland with volcanic ash less than 20 centimeters thick, it will be a great blessing for farmers, because the volcanic ash is rich in nutrients and can make the land more fertile.