1930 Bago earthquake
... that during the 1930 Bago earthquake, a witness observed surface waves propagating through a tennis court?
... that during the <b id="mwBSI"><a href="./1930_Bago_earthquake" id="mwBSM" rel="mw:WikiLink" title="1930 Bago earthquake">1930 Bago earthquake</a></b>, a witness observed <a href="./Seismic_wave#Surface_waves" id="mwBSQ" rel="mw:WikiLink" title="Seismic wave">surface waves</a> propagating through a tennis court?