Chlamydia is one of the most common STDs, particularly among college-aged men and women. Fortunately, unlike in the old days, it's now quite easy and painless to get tested and treated for a chlamydia infection. In recent years, tests have been developed that can detect chlamydia and be completed in just a few hours.
Seismograms A, B, C, and D. show, in Greenwich time, the arrival times of the. earthquake waves at the four stations. The P-wave generated by this earthquake took 2 minutes. and 40 seconds to reach one of the seismic stations.
The distance of the seismograph station from the earthquakeâs epicenter is about (1) 1,000 km (2) 1,500 km (3) 2,000 km (4) 2,500 km 17. The seismograph to the right shows the arrival times of P-wave and S-waves from a single earthquake.