When my office/apartment started to shake at 10:35 a.m. today, the movement wasn't initially so great. Luckily, I had enough wits about me to grab my cell phone and start taking a video. The rocking you see of the chairs above is all from the movement. So it was a pretty good shake. But nothing like the 7.4 magnitude quake in March that knocked flower vases onto the floor and shook glasses off shelves.
The news reports say the earthquake's epicenter was off the coast of Guatemala near the border with Mexico. They say it, too, was a magnitude 7.4 quake. It shook buildings in San Salvador and Guatemala City quite hard, but only caused swaying here in far-away Mexico City.
Like in March, I was struck by how fast Mexico City Mayor Marcelo Ebrard was pumping out tweets about the situation, noting that there was no damage and that the subway was running normally.