>> WELL, FOLKS IN THE INLAND EMPIRE FELT SOME SHAKING DURING AN EARTHQUAKE SWARM. >> ONE VIEWER SHARING HOME SECURITY VIDEO OF THE SHAKING INSIDE THEIR HOUSE. THE FIRST QUAKE STRUCK JUST AFTER 10:00 THIS MORNING NEAR ARCHIBALD AND THE 60 FREEWAY, REGISTERED AS A MAGNITUDE 3.5 QUAKE, AND IT TURNED OUT TO BE A FORESHOCK BECAUSE ABOUT A HALF HOUR LATER, A 3.9 MAGNITUDE QUAKE HIT THAT HAS BEEN THE MAIN QUAKE THUS FAR COULD BE SURPASSED. OF COURSE, IT WAS THEN FOLLOWED BY A 2.8. FOLKS IN ONTARIO WERE A BIT SHAKEN UP, ALTHOUGH EVERYONE WAS JUST SCREAMING LIKE GOING CRAZY. >> LIKE THAT SECOND ONE HIT AND IT WAS JUST LIKE AN EVEN, LIKE JUST IT WAS A BIGGER ONE. >> OBVIOUSLY IT WAS MORE NOTICEABLE AND EVERYONE JUST KIND OF FROZE FOR A SECOND. ALL OF A SUDDEN, EVERYTHING SHOOK. I FELT LIKE THE TRUCK WAS COMING THROUGH THE THROUGH THE STORE RIGHT HERE, ESPECIALLY WITH ALL THE MERCHANDISE. IT WAS IT FELT A LOT STRONGER. >> DOCTOR LUCY JONES SHARING SOME INSIGHT ON TWITTER TODAY, SAYING THE QUAKES HAPPENED ON THE FONTANA SEISMICITY LINEATION, WHICH IS A NORTHEAST STRIKING LINE KNOWN FOR PRODUCING SMALL QUAKES AND WE ALWAYS LEARN SO MUCH AFTER EVERY QUAKE FROM DOCTOR JONES. HERE'S A LOOK AT THE STRENGTH OF TODAY'S QUAKES. TAKE A LOOK AT THE PURPLE COLUMNS. THE QUAKES WERE BELOW A MAGNITUDE FOUR, WHICH IS CONSIDERED LIGHT WITH NOTICEABLE SHAKING, BUT STILL IT'S EQUIVALENT TO ABOUT 33,000 POUNDS OF EXPLOSIVES. >> AND BE SURE TO DOWNLOAD THE MYSHAKE APP. IT DELIVERS EARTHQUAKE ALERTS ALL ACROSS CALIFORNIA. YOU CAN SEE DAMAGE AND SHAKING REPORTS SUBMITTED BY OTHER COMMUNITY MEMBERS, AS WELL AS INFORMATION FROM THE USGS AND OTHER GLOBAL EARTHQUAKE AUTHORITIES. TYPICALLY, WARNINGS ONLY GO OUT FOR MAGNITUDE 4.5 OR HIGHER EARTHQUAKES TO USERS IN AREAS OF LIGHT TO SEVERE SHAKING. THAT APP IS FREE TO DOWNLOAD. >> AND OF COURSE, TODAY'S QUAKES ARE A GOOD REMINDER TO PREPARE FOR A BIGGER ONE. YOU CAN FIND ALL THE