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.
USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes and earthquake hazards Jump to Navigation How long did the shaking last? At almost precisely 5:12 a.m. local time, a foreshock occurred with sufficient force to be felt widely throughout the San Francisco Bay area. The great earthquake broke loose some 20 to 25 seconds later, with an epicenter near San Francisco... Violent shocks punctuated the strong shaking, which lasted some 45 to 60 seconds. The earthquake was felt from southern Oregon to south of Los Angeles and inland as far as central Nevada..