I just reviewed the latest reports from USGS on seismic activity in the United States during January 29 and 30, and there has been quite a bit of tectonic movement recorded. A total of 9 earthquakes were detected across U.S. territory and its territories in the past 24 hours, but the one that caught my attention was a magnitude 4.2 near Black Eagle, Montana. It's not cause for alarm, but it definitely shows the constant activity underground.

What's interesting is that there were several tremors spread across the country: from Alaska with multiple quakes ranging from magnitude 2.6 to 3.7, through Colorado, Texas, New Mexico, Oregon, all the way to Puerto Rico. One in Puerto Rico reached magnitude 3.1, and another in New Mexico hit 3.9. Basically, U.S. territory is quite seismically active.

This made me think about the San Andreas Fault, which runs about 1,300 kilometers through California. Scientists have been warning for years about the possibility of the famous Big One, that magnitude 8 or higher earthquake that could strike the region. If the Big One were to happen, it would be devastating for cities like Los Angeles and San Francisco. The last major quake in that area was the San Francisco earthquake of 1906 with a magnitude of 7.8, over a century ago.

What worries experts most is that the Big One is virtually inevitable in the long term; it’s not a matter of if it will happen, but when. That’s why authorities are constantly conducting drills and reviewing safety measures. Definitely something to keep in mind if you live on California’s coast.