Approximately how many earthquakes are strong enough to be felt each year worldwide? a. 500 b. 1000 c. 10,000 d. 30,000 2. what isthe location on the surface directly above the earthquake focus called? a. epicenter b. fault c. magnitude d. moho

1. d. 30,000

2. a. epicenter

Explanation:

each year worldwide Approximately 30,000 earthquakes are felt. That includes all magnitudes from 0.1 to 9.9.

In seismology, the epicenter, epicentre or epicentrum is the location on the surface directly above the earthquake focus.

wavelength divides in half and speed stays the same.

conservation of mass

mass before something happens = mass afterwards