After the 1933 Long Beach earthquake in California , a large experiment campaign led by D. S. Carder in 1935 allowed to record and analyze ambient vibrations in more than 200 buildings . These data were used in the design codes to estimate resonance frequencies of buildings but the interest of the method went down until the 1950s . Interest on ambient vibrations in structures grew further , especially in California and Japan , thanks to the work of earthquake engineers , including G. Housner , D. Hudson , K. Kanai , T. Tanaka , and others
1933 Long Beach earthquake
1933 Long Beach earthquake
Seismic noise