ANCHORAGE, Alaska (AP) — The magnitude 7.0 earthquake that rattled Alaska's largest city cracked roads and collapsed highway ramps, but there were no reports of widespread catastrophic damage or collapsed buildings. There's a good reason for that. A devastating 1964 Alaska earthquake — the most powerful on record in the United States — led to stricter building codes that helped structures withstand the shifting earth Friday. "Congratulations to the people of Alaska for being really prepared for this earthquake," U.S.