DAVID , Panama ( CNN ) -- NEW : Frightened patients leave , and refuse to return as aftershocks hit . NE : No immediate reports of damage ; damage reported but extent not yet known . Quake struck at 6 a.m . ET about 240 miles ( 380 km ) west of Panama City .
NEW : Frightened patients leave , and refuse to return as aftershocks hit . NE : No immediate reports of damage ; damage reported but extent not yet known . Quake struck at 6 a.m . ET about 240 miles ( 380 km ) west of Panama City .