This map shows the predicted (theoretical) travel times, in minutes, of the compressional (P) wave from the earthquake location to points around the globe. The travel times are computed using the spherically-symmetric IASP91 reference earth velocity model. The heavy black lines shown are the approximate distances to the P-wave shadow zone (103 to 120 degrees).
99/08/17 00:01:38 40.64N 29.83E 10.0 7.8Ms
The following is a release by the United States Geological Survey, National Earthquake Information Center: A major earthquake occurred about 55 miles (90 km) east-southeast of Istanbul or about 165 miles (270 km) west-northwest of Ankara at 6:02 PM MDT today, Aug 16, 1999 (Aug 17 at 3:02 AM local time in Turkey). A PRELIMINARY MAGNITUDE OF 7.8 WAS COMPUTED FOR THIS EARTHQUAKE. The magnitude and location may change slightly as additional data are received from other seismograph stations. There have been unconfirmed reports of damage and possible casualties.
National Earthquake Information Center