https://www.tsunami.gov/Bystander said:
"Mw" stands for moment magnitude, which is a measure of the size of an earthquake based on the amount of energy it releases. A magnitude 7.5 earthquake is considered a major earthquake and can cause significant damage.
Yes, a magnitude 7.5 earthquake can be very dangerous and cause widespread damage. The severity of the damage depends on factors such as the location of the earthquake and the type of terrain in the affected area.
The distance of the earthquake from your location cannot be determined solely based on the magnitude shown on your seismograph. The magnitude only indicates the strength of the earthquake, not its distance.
It is possible for there to be aftershocks after a magnitude 7.5 earthquake, but it is not guaranteed. Aftershocks are smaller earthquakes that occur in the same area as the initial earthquake and can continue for days, weeks, or even months after the main event.
If you see a magnitude 7.5 earthquake on your seismograph, it is important to follow any emergency procedures or evacuation orders that may be in place. If you are in an earthquake-prone area, it is always a good idea to have an emergency plan in place and be prepared for potential earthquakes.