Original: After passing Guam, it rapidly intensified and reached peak winds of 305 km\/h (190 mph) and a worldwide record low sea-level pressure of 870 mbar (hPa, 25.69 inHg) on October 12.
Simplified: After passing near Guam, it strengthened quickly and reached its highest winds of 305 km\/h (190 mph) and a worldwide record low barometric pressure of 870 mbar (hPa, 25.69 inHg) on October 12.