A 5.3-magnitude earthquake struck Mindanao, Philippines. What caused the earthquake?

Most of the causes of earthquakes are earthquakes caused by the earth's crustal movement.

How did the earthquake happen?

An earthquake refers to the vibration of the earth's surface. There are many main reasons for earthquakes, which may be man-made, such as nuclear bomb explosion, fire and so on. It may also be due to natural causes, such as tectonic earthquakes and active volcanic earthquakes. Earthquakes can also be called earthquakes and earthquakes, which refer to the vibrations generated during the energy release in the earth. Earthquakes also produce seismic waves, which is a natural phenomenon. The main reason of earthquake is that the plates squeeze each other, which leads to the internal structural error of plates and leads to earthquake. Earthquakes always lead to serious casualties, as well as disasters such as fires and floods, which are extremely harmful.

What are the signs before the earthquake?

The nine signs before the earthquake are surface water anomaly, surface water anomaly, meteorological anomaly, ground sound anomaly, ground motion anomaly, earthquake anomaly and electromagnetic induction anomaly. We can carry out earthquake inspection and weather forecast according to this abnormal phenomenon, and we can also evacuate in advance and take protective measures according to the abnormal phenomenon that we can feel. The biological reaction is strong and abnormal. The human organs of many animals feel very sensitive. They should know the probability of some disasters in advance. For example, octopus in the ocean can predict hurricanes, and rats can avoid coal mine collapse or harmful substances in advance. The weather was abnormal before the earthquake, and the weather often appeared abnormal. It mainly includes high temperature before the earthquake, long-term drought or continuous rain, yellow fog, dim sunshine, strange wind and hail in June. Ground sound anomaly refers to the underground sound before the earthquake, just like gunfire and thunder.

Geomagnetic anomaly refers to the brightness of the underground before the earthquake. It comes in various colors. Rare mixed colors can be seen in life, such as silver blue and white purple, mainly bright red and white; Its shapes are also different, such as strip, sphere, column, diffusion and so on. Underground pulsation anomaly refers to the underground fog before the earthquake, also known as underground fog or underground fog. This fog has several colors, such as white, black and yellow. Sometimes it has no color. It usually occurs a few days to a few minutes before the vibration, usually accompanied by odor, occasional noise or continuous high temperature.