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How far from an earthquake epicenter is an observer who measured a difference of 8 min 40 s in the arrival times of p and s waves?
The time difference between the arrival of P (primary) and S (secondary) waves at a seismic station is directly related to the distance from the earthquake epicenter. In this case, the 8 minutes and 40 seconds delay corresponds to the time it took for the S waves to arrive after the P waves. Using the standard average velocities of P and S waves (about 6 km/s and 3.5 km/s respectively), we can calculate the distance to be approximately 34.6 kilometers from the epicenter.
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How could you tell which of two observers was farther from an earthquake epicenter by comparing the arrival times of p waves and a waves for the two locations?
To determine which observer is farther from an earthquake epicenter, you can compare the arrival times of P-waves (primary waves) and S-waves (secondary waves). P-waves travel faster than S-waves, so if one location records P-waves significantly earlier than S-waves, it indicates that the observer is closer to the epicenter. By measuring the time difference between the arrival of the P-waves and S-waves at each observer's location, the observer with the greater time difference is farther from the epicenter.
How could you tell which two observers was farther from an earthquake epicenter by comparing the arrival times of p and S waves for the two locations?
To determine which observer is farther from an earthquake epicenter, you can compare the arrival times of P (primary) waves and S (secondary) waves at each location. P waves travel faster than S waves, so the time difference between their arrivals increases with distance from the epicenter. By analyzing the time difference for each observer, the location with the greater time gap indicates a farther distance from the epicenter. The greater the delay in S wave arrival after the P wave, the farther the observer is from the epicenter.
How far from an earthquake epicenter is an observer who measured a difference of eight minutes 40 seconds and arrival times of p waves and s waves?
To calculate the distance from the earthquake epicenter based on the difference in arrival times of P-waves and S-waves, we use the fact that P-waves travel faster than S-waves. The average difference in arrival time is approximately 1 minute for every 8 kilometers (5 miles) from the epicenter. Given an arrival time difference of 8 minutes and 40 seconds (which is 8.67 minutes), the distance would be about 69.36 kilometers (or approximately 43.2 miles) from the epicenter.
How does the frequency measured in front of the source appear to the observer compared to the frequency measured from behind?
The frequencies are the same, unless the source is moving relative to the observer.
What is a difference in the brightness of two lights indicative of?
A difference in the brightness of two lights is indicative of unequal luminous intensity. This can be caused by variations in the power output, distance from the observer, or the type of light source used for each.
How could you tell which two observers was farther from an earthquake epicenter by comparing the arrival times of p and S waves for the two locations?
To determine which observer is farther from an earthquake epicenter, you can compare the arrival times of P (primary) waves and S (secondary) waves at each location. P waves travel faster than S waves, so the time difference between their arrivals increases with distance from the epicenter. By analyzing the time difference for each observer, the location with the greater time gap indicates a farther distance from the epicenter. The greater the delay in S wave arrival after the P wave, the farther the observer is from the epicenter.
How far is an observer from an earthquake epicenter is he or she observed a P wave 8 minutes after the earthquake?
14,4oo km away. i think. check calculations to be sure.
Approximately how far is an observer from and earthquake epicenter if he or she observed a p wave 8 minutes after the earthquake?
Based on the average speed of a P-wave (6 km/s), if the observer detected the P-wave 8 minutes after the earthquake, they would be approximately 2880 km away from the epicenter. This calculation assumes the P-wave travelled directly through the Earth without any barriers altering its speed.
How does the frequency measured in front of the source appear to the observer compared to the frequency measured from behind?
The frequencies are the same, unless the source is moving relative to the observer.
What is path difference?
The path difference is the difference in the physical distance between the two sources to the observer, i.e., the difference in distance travelled from the source to the observer.
Why do you need data from three seismographs to find the epicenter of an earthquake?
Data from one seismometer can give you the distance to an earthquakes epicentre. When data from two stations is available, by plotting the calculated distances as a circle of known radius around the stations, these two circles will intersect in two places. Add in a third station and all three circles will intersect in the same place which is the epicentre.
What is The altitude if Polaris measured by an observer atcthe tropic of cancer?
23.5
What is an apparent brightness?
An apparent brightness is the brightness of a star as measured by an observer.
What are some possible errors when using a Modified Mercalli scale?
the assigned nember can vary from place to place within the disturbed region depending on the location of the observer with respect to the earthquake epicenter. In addition some witnesses of the earthquake might exaggerate how bad thing were during the earthquake and some witnesses might not agree on what happened during the earthquake.
Define true zenith distance n meridional zenith distance?
Defining true zenith distance is knowing the difference between Africa and south America.True zenith distance is associated with Greenwich line and meridional zenith distance is defined with the celestial equator which instructs the basin of south america. -AG
What could be the approximate location of an observer if he measured the altitude of Polaris to be 41 degrees above the horizon?
New York City.
What is a difference in the brightness of two lights indicative of?
A difference in the brightness of two lights is indicative of unequal luminous intensity. This can be caused by variations in the power output, distance from the observer, or the type of light source used for each.
