According to the CDC ... the first thing to do during an earthquake is to drop to the ground before it knocks you down and crawl underneath a sturdy desk or table to protect yourself from falling objects.

If no such structure is available, get near some low-lying furniture and cover your neck and head. Then, hold on to your makeshift shelter until the shaking stops ... and pray for dear life!

Our own Charlie Neff stood out as a model earthquake expert by the CDC's guidelines ... dropping to the floor and rolling under her desk as soon as the building started to shake.

Charlie, an L.A. native, credits dozens of elementary school earthquake drills for preparing her for exactly this moment.

Her deskmate, Brendon Geoffrion, could probably have used a few more of those drills himself ... 'cause he decided to start wandering around and investigate the ceiling. Pretty much the opposite of the suggested guidelines!

Charles Latibeaudiere didn't hit the ground ... but nearly hit the ceiling with how high he jumped when the quake started. The scary shake definitely gave him a startle --- though he quickly regained composure and checked on everyone to make sure they were OK.

Another camera angle will give you a pretty good idea of how badly the building was shaking ... and our man John Brix knew what was up. Check him out on the right side of the screen, brown beanie on. He disappeared under the desk about as quickly as he could.

The ordeal definitely gave the whole office a jolt ... but don't worry ... everybody's fine, and nothing major seems to have been broken. So all's well that ends well!

Remember ... earthquakes can feel differently to everyone. One of our staff members said she thought someone was shaking her chair while another could've sworn the earthquake was just a heavy gust of wind.

If you're not sure ... the best thing to do is drop, cover and hold -- better safe than sorry.