As the search for survivors of yesterday’s explosion in Beirut continues, at this point we know that it left more than 100 people dead and thousands of others injured. The blast happened near the Lebanese capital’s port, though it could be felt from more than 150 miles away in Cyprus, the New York Times reports.
It appears as though the explosion was caused by the detonation of more than 2,700 tons of ammonium nitrate—a chemical used in everything from bombs to fertilizers—which had been stored in a warehouse near the port. To put that in perspective, two tons of the chemical went into bomb used to attack a federal building in Oklahoma City in 1995, which killed 168 people. (Read this explainer from Al Jazeera to learn more about ammonium nitrate.)