They don’t know where and they don’t know when, but “line watchers” (as they call themselves,) know one thing for sure, there’s a heck of alot of seismic activity in california right now.

The following photo depicts a live stream Seismograph, aka a Richter Scale, stationed in the basement of the southland offices of LA news station ABC7. As you can plainly see, the tremors have been hitting one after another for about the past 20 hours or so.

Although it’s no guarantee that a larger earthquake is getting ready to strike, the increased seismic activity does succeed at rattling nerves.

Interested in becoming a line watcher? You can check out the live stream seismograph for yourself here.