3 ms·
1992: 4,000mph, Los Angeles http://articles.latimes.com/1992-04-17/local/me-607_1_spy-plane http://articles.latimes.com/1992-04-17/local/me-607_1_spy-pl... USG
by vpribish 9y ago
1992: 4,000mph, Los Angeles
http://articles.latimes.com/1992-04-17/local/me-607_1_spy-plane http://articles.latimes.com/1992-04-17/local/me-607_1_spy-pl...
USGS on seismographs and sonic booms generally:
https://earthquake.usgs.gov/learn/topics/sonic-booms.php https://earthquake.usgs.gov/learn/topics/sonic-booms.php