Answer: I guess the explanation is the answer
Explanation: An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction.
Explanation:
Both eras and periods are greater, but an era is more than 1 year
Northern Hemisphere portrays the upper air westerlies having troughs as well as ridges. The upper air westerlies depicts clockwise curvature in elevation. On a weather map of the Northern Hemisphere, one can see the westerlies among the subtropical highs and subpolar lows.
