What type of earthquake was the 1906 San Francisco earthquake?

1906 San Francisco earthquake

What type of fault is the San Andreas Fault?

strike-slip fault – a fault on which the two blocks slide past one another. The San Andreas Fault is an example of a right lateral fault.

How did the San Francisco earthquake form?

The quake was caused by a slip of the San Andreas Fault over a segment about 275 miles long, and shock waves could be felt from southern Oregon down to Los Angeles. San Francisco’s brick buildings and wooden Victorian structures were especially devastated.

Did the 1906 earthquake cause a tsunami?

Even though the magnitude of the 1906 earthquake was large (M 7.8), it generated a tsunami wave only approximately 10 cm in height.

What tectonic plate interaction caused the San Francisco earthquake?

Along the coast of California, the tectonic plate underlying the Pacific Ocean and the plate harboring the North American landmass meet at the San Andreas Fault. Intense pressure builds up along the fault as the two plates grind past each other, the Pacific Plate moving northwest relative to the North American Plate.

Is San Francisco on a fault line?

The San Andreas Fault

San Francisco, Sacramento and the Sierra Nevada are on the North American Plate. The two plates crisscross with many active and passive earthquake faults.

What type of earthquake was the Northridge earthquake?

1994 Northridge earthquake

Is the San Andreas Fault convergent or divergent?

Explanation: The San Andreas Fault is where the Pacific plate collides with the North American plate. this is a convergent boundary. The two plates hit an angle in California.

What type of plate boundary is found at the San Andreas Fault?

transform plate boundary

The San Andreas Fault is part of a transform plate boundary that disrupts the topography of an ancient subduction zone.

What plates formed the San Andreas Fault?

The San Andreas fault line formed about 30 million years ago as the North American plate engulfed nearly all of the Farallon plate. Since then, the North American plate has ground against the Pacific plate at a boundary called a strike-slip fault.

What are the 3 fault types?

There are three main types of fault which can cause earthquakes: normal, reverse (thrust) and strike-slip. Figure 1 shows the types of faults that can cause earthquakes. Figures 2 and 3 show the location of large earthquakes over the past few decades.

What is a crack in the Earth called?

Faults are cracks in the earth’s crust along which there is movement. These can be massive (the boundaries between the tectonic plates themselves) or very small. If tension builds up along a fault and then is suddenly released, the result is an earthquake.

What are the 4 different types of faults?

There are four types of faulting — normal, reverse, strike-slip, and oblique. A normal fault is one in which the rocks above the fault plane, or hanging wall, move down relative to the rocks below the fault plane, or footwall. A reverse fault is one in which the hanging wall moves up relative to the footwall.

What is the fastest earthquake wave?

P 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. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P wave.

Can there be a 10.0 earthquake?

No, earthquakes of magnitude 10 or larger cannot happen. The magnitude of an earthquake is related to the length of the fault on which it occurs. That is, the longer the fault, the larger the earthquake.

What is P and S waves?

Primary (P) and secondary (S) waves are two types of waves caused by earthquakes. They are defined based on when they arrive and are felt on the surface. P waves, or primary waves, arrive first while S waves, or secondary waves, arrive second. Both waves cause the ground to shake when an earthquake occurs.

What does P in a P wave stand for?

primary

Compressional waves are also called P-Waves, (P stands for “primary”) because they are always the first to arrive. They gave us the first jolt last Friday. Shear waves propagate more slowly through the Earth than compressional waves and arrive second, hence their name S- or secondary waves.

Who discovered P and S waves?

Inge Lehmann

It’s thanks to a pioneering scientist named Inge Lehmann — who would have turned 127 today — that scientists know that inner core exists. According to the American Museum of Natural History, Lehmann made her discovery while studying a type of seismic shock wave called Primary waves, or P-waves.

What do you mean by S wave?

An S wave, or shear wave, is a seismic body wave that shakes the ground back and forth perpendicular to the direction the wave is moving.

What is Al wave?

noun Geology. an earthquake wave that travels around the earth’s surface and is usually the third conspicuous wave to reach a seismograph. Also called long wave .

What does Ps and l mean?

A. S. Adikesavan. Jul 20, 2016. P, S and L waves refer to Primary, Secondary and Longitudinal waves. L is also the first letter in Love waves.

How fast do Love waves travel?

Love waves race around the Earth at almost 10,000 miles per hour. Their relatives, the Rayleigh waves, lag behind slightly, but still speed at about 7800 miles an hour. It seems that only the International Space Station is faster.

What do Love waves look like?

Love waves have a horizontal motion that moves the surface from side to side perpendicular to the direction the wave is traveling. Of the two surface waves, Love waves move faster. Rayleigh waves cause the ground to shake in an elliptical pattern. This motion is similar to that observed in ocean waves.

What type of wave is P wave?

compressional waves

P Waves. P waves are compressional waves that do not produce much damage. They can move through any type of material and travel at almost twice the speed of S waves.

Do Love waves travel through the Earth?

Love and Rayleigh waves are guided by the free surface of the Earth. They follow along after the P and S waves have passed through the body of the planet.

What kind of waves can travel through a liquid?

P waves can travel through the liquid outer core. An S wave is a different beast. In an S wave, the rock particles slide past one another, undergoing shear — so an S wave is also called a shear wave.

What makes a sound same high or low?

How high or low a sound seems to a listener is its pitch. Pitch, in turn, depends on the frequency of sound waves. High-frequency sound waves produce high-pitched sounds, and low-frequency sound waves produce low-pitched sounds.

What makes a sound seem high or low?

Sounds are higher or lower in pitch according to the frequency of vibration of the sound waves producing them. A high frequency (e.g., 880 hertz [Hz; cycles per second]) is perceived as a high pitch and a low frequency (e.g., 55 Hz) as a low pitch.

Why do S-waves stop at the outer core?

Seismic waves move more slowly through a liquid than a solid. Molten areas within the Earth slow down P waves and stop S waves because their shearing motion cannot be transmitted through a liquid.

Why shear waves Cannot travel through liquids?

S-waves cannot travel through liquids. When they reach the surface they cause horizontal shaking. Liquids don’t have any shear strength and so a shear wave cannot propagate through a liquid.

Why are P-waves faster?

P-waves and S-waves are body waves that propagate through the planet. 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.