1930 Salmas earthquake
The 1930 Salmas earthquake, which was among Iran's largest, measured 7.1 on the moment magnitude scale and had a maximum Mercalli intensity of IX (Violent). It is estimated that the original shock left 60 villaged destroyed and up to 3,000 fatalities.
San Francisco International Airport opened
Located 13 miles (21 km) south of Downtown San Francisco, San Francisco International Airport is the largest airport in the San Francisco Bay Area and the second-busiest in California, after Los Angeles International Airport. The airport covers 5,207 acres (21.07 km2) and has four asphalt runways, arranged in two intersecting sets of parallel runways.
Stockholm's royal castle destroyed by fire
Stockholm's royal castle, the medieval The Kronor Castle, was destroyed by a fire. The fire ruined most of the earlier fortress, the Tre Kronor Castle, except for the sturdy, recently constructed walls of the northern row, most of which are still standing. Unlike the rest of the castle, the walls of the northern row could be repaired.
Hagia Sophia dome collapsed
Hagia Sophia is a mosque in Istanbul, Turkey (then Constantinople, Byzantine Empire), originally built as an Eastern Orthodox church by the Byzantine emperor Justinian I. The dome of Hagia Sophia collapsed during a subsequent earthquake, 20 years after it was built. The collapse was due mainly to the excessive bearing load and to the enormous shear load of the dome, which was too flat. It was later restored using lighter materials and different dome type.
