Is a 9.0 earthquake possible?
Is a 9.0 earthquake possible?
Erin Wirth, a geophysicist at the University of Washington and the US Geological Survey, told Geekwire: “We say that there’s approximately a 14 percent chance of another approximately magnitude-9 earthquake occurring in the next 50 years.”
What does a 9.5 earthquake feel like?
The shaking will feel violent and it will be difficult to stand up. The contents of your house will be a mess. A large earthquake far away will feel like a gentle bump followed several seconds later by stronger rolling shaking that may feel like sharp shaking for a little while.
Which earthquake waves are the slowest fastest?
There are two types of body waves: P-waves travel fastest and through solids, liquids, and gases; S-waves only travel through solids. Surface waves are the slowest, but they do the most damage in an earthquake.
What is the fastest type of waves?
P wave
What happens when stress builds at faults?
The high pressure caused by the geologic activity results in movement of the crust. That movement creates lot of pressure on the rocks, so they gradually twist, band, and break because of it.
What does the S in S waves stand for?
secondary
What are P and S waves?
P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. The different S waves arrive after the P waves. The slowest (and latest to arrive on seismograms) are surface waves, such as the L wave.
What are the 4 types of seismic waves?
Seismic Wave Motions—4 waves animated
- Body Waves – Primary (P) & Secondary (S) Waves.
- Surface Waves – Rayleigh & Love Waves.
What is the difference between P waves and S waves?
P waves travel at speeds between 1 and 14 km per second, while S waves travel significantly slower, between 1 and 8 km per second. The S waves are the second wave to reach a seismic station measuring a disturbance. The difference in arrival times helps geologists determine the location of the earthquake.
What is stronger P or S waves?
Earth Observatory of Singapore P-waves travel 60% faster than S-waves on average because the interior of the Earth does not react the same way to both of them. P-waves are compression waves that apply a force in the direction of propagation.
What are the 2 types of body waves and describe them?
Body waves are of two types: Primary waves (also called P-waves, or pressure waves) and Secondary waves (S-waves, or shear waves). P-waves are compression waves. They can propagate in solid or liquid material. S-waves are shear waves.
How do you find P waves and S waves?
Measure the distance between the first P wave and the first S wave. In this case, the first P and S waves are 24 seconds apart. Find the point for 24 seconds on the left side of the chart below and mark that point. According to the chart, this earthquake’s epicenter was 215 kilometers away.
Which set of waves are the P waves?
A P wave, or compressional wave, is a seismic body wave that shakes the ground back and forth in the same direction and the opposite direction as the direction the wave is moving.
How do you find the P wave arrival time?
7) If you are asked to determine the arrival time of the P-wave and given a clock time for the arrival of the S-wave: Find difference in arrival time between P-wave and S-wave at the given epicenter distance, Subtract the difference in arrival time from the clock time of the S-wave.
What is the difference between the arrival time of P and S waves?
S waves are slower than P waves by a known amount. Therefore, the farther a seismic recording station is from the earthquake epicenter the greater will be the difference in time of arrival between the P and S wave.
Which types of earthquake waves will most probably be detected in zones A and B?
Which types of earthquake waves will most probably be detected in zones A and B? (1) zone A: P-waves, only; zone B: S-waves, only (3) zone A: S-waves, only; zone B: P-waves, only (2) zone A: P-waves, only; zone B: no P- or S-waves (4) zone A: S-waves, only; zone B: no P- or S-waves Page 3 5.
How long does it take a P wave to travel 5 000 km?
to travel 5,000km? Go to the chart! Go to the chart! The recording station tells us it took 6 minutes and 20 seconds for the P-Wave to reach them.
What are the two primary types of waves generated by earthquakes?
NARRATOR: Earthquakes generate two main types of seismic, or shock, waves: body waves and surface waves. Body waves travel through the interior of the earth. The fastest of these are primary, or “P,” waves. These compressional waves move faster in dense rock and slower in fluids.
Which is more destructive Love or Rayleigh?
Although surface waves travel more slowly than S-waves, they can be much larger in amplitude and can be the most destructive type of seismic wave. Love waves cause horizontal shearing of the ground. They usually travel slightly faster than Rayleigh waves.
Why are L waves most destructive?
Of the two types of surface waves, the L-waves are the most destructive. They can literally move the ground beneath a building faster than the building itself can respond, effectively shearing the base off of the rest of the building. There are two types of body waves, P-waves and S-waves.
