There was another mass shooting on Wednesday — in Savannah, Georgia

Over 2,300 miles away from the San Bernardino complex where 14 were killed at a holiday party on Wednesday, authorities in Savannah, Georgia, were investigating another mass shooting: At 1:30 a.m., a gunman opened fire on a residential block, killing one woman and injuring three men.

There are several definitions for what qualifies as a mass shooting. One, established by amateur watchdogs on Reddit, tracks "mass shootings" as incidents where four or more people — including the gunman — are shot or killed. The old FBI definition, according to The Washington Post, is a little more selective, measuring events where four or more people are killed in a single shooting. By that count, the last mass shooting was just over a week ago, when a gunman in Columbus, Ohio, killed a couple, the couple's seven-year-old son, and himself, injuring one other.

"We have a pattern of mass shootings in this country that has no parallel anywhere else in the world," President Obama said on Wednesday. "There's some steps we could take — not to eliminate every one of these mass shootings, but to improve the odds that they don't happen as frequently."

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