Problem: Unusual volcanic activity in Mexico.
Cause: UFOs. Duh:
What is really strange is the periodic harmonic tremor. According to some scientists the tectonic activities may have been triggered artificially. One possibility is that the hot spot of active volcano is disturbed by some extraterrestrial experiments controlled by aliens. Mexico recently has reported excessive sightings of UFOs. The other alternative can be that some kind of military experimentation is going on there.