The swarm of quakes have been happening for a month around north San Jose where many rich Reptilians live and work in high tech industries.
The swarm is concentrated beside the dam of Calaveras Reservoir. All the dams are surface facilities of Reptilian Secret Underground Bases. When they construct a dam, they dig deep and make underground facilities. This swarm of quakes is manifestation of the Cleaning-up Operation on Reptilian Secret Underground Base led by Galactic Federation of Light.
People living there felt jolt rather than normal shake of quakes. That jolts are caused by that Cleaning-up Operation.
The year 2020 should be the final stage of the cleaning-up Operation.