Aseismograph records the arrivals of a p-wave at 11: 13 am. if the earthquake occurred 4,000 km from the recording station, when did the earthquake occur
a. 11: 06 am
b. 11: 11 am
c. 11: 13 am
d. 11: 20 am

Answer is 11:06 a.m

Attached is an example of a GIF to calculate the travel time of a P-wave for a given epicenter. The given distance from epicenter to the recording station in this case is 4000 km. The Y-axis in the GIF attachment represents the time travel time while the X-axis represents the epicenter distance (× 10³ km). The idea here is to go to the epicenter distance on the x-axis and go up to the correct curve. You can then go over to the y-axis and determine the travel time. The answer will be 7 minutes from the epicenter to the recording station

i luv u cutie patuti; kjebi; aewb