Does the lag time get shorter or longer the further you get from the epicenter?
Longer time lag means you are farther from the epicenter. Shorter time lag between waves means the waves are nearly on top of each other, meaning you are nearer to the epicenter.
How can you prove an epicenter was where you calculate it to be?
The distance between the beginning of the first P wave and the first S wave tells you how many seconds the waves are apart. This number will be used to tell you how far your seismograph is from the epicenter of the earthquake.
How does a hypocenter differ from an epicenter?
The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus. See also epicenter.
Why earthquakes are stronger near the epicenter?
The magnitude of an earthquake is related to the total area of its fault rupture. When a fault ruptures unilaterally (with the epicenter at or near the end of the fault break) the waves are stronger in one direction along the fault.
What is the similarities of magnitude and intensity?
Magnitude is a measure of earthquake size and remains unchanged with distance from the earthquake. Intensity, however, describes the degree of shaking caused by an earthquake at a given place and decreases with distance from the earthquake epicentre.
What is the meaning of epicenter?
1 : the part of the earth’s surface directly above the focus of an earthquake — compare hypocenter sense 1.
What is felt near epicenter and a focus?
The point inside the crust where the pressure is released is called the focus . The point on the Earth’s surface above the focus is called the epicentre . The waves are felt most strongly at the epicentre, becoming less strong as they travel further away. …
What is the meaning of focus and epicenter?
Epicenter is the location on the surface of the Earth directly above where the earthquake starts. Focus (aka Hypocenter) is the location in the Earth where the earthquake starts.
What is the importance of Epicenter?
Answer: The main importance in determining the epicentre is so that the fault that ruptured causing the earthquake can be identified. If the fault is previously unknown (such as the 2010 Canterbury earthquake), then it is important because it means that the hazard models for the area need improvement.
Does epicenter mean starting point?
In seismology, the epicenter is the place on the surface of the earth above the origin of an earthquake, whereas the hypocenter is the actual starting point within the earth. In seismology, the epicenter refers to the part of the earth’s surface directly above the focus of an earthquake.