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Geophysics

The study of Earth using the combination of Geology and Physics, it lets us understand what is going on under the Earth's surface. Find questions on different types of seismic activities such as earthquakes and volcano eruptions here.

1,480 Questions

What are some non-examples for acid rain?

  1. Rainwater that has a neutral pH level of around 7.
  2. Water that does not contain elevated levels of sulfuric or nitric acids.
  3. Precipitation that does not cause harm to the environment or human health due to acidic compounds.

Why is the asthenosphere able to flow like plastic?

The asthenosphere can flow like a plastic because it is composed of partially melted rock that has a high temperature and pressure. This partial melting allows the rock to deform and flow slowly over long periods of time, similar to how plastic can be molded and shaped under the right conditions.

Why wegeners ideas about continental drift were not believe?

Wegener's ideas about continental drift were initially not believed because he lacked a plausible mechanism to explain how the continents could move. Additionally, his theory went against the prevailing scientific consensus of the time, which held that the ocean floor was too rigid to allow for such movement. It wasn't until the discovery of seafloor spreading and plate tectonics that Wegener's ideas gained wider acceptance.

What information could you get about an earthquake's location from only two seismic stations data?

By comparing the arrival times of the earthquake's waves at the two stations, you can determine the distance between the earthquake and each station. With this information, you can use triangulation to estimate the earthquake's location based on the intersection of the circles representing the distance between the earthquake and each station.

Which Asian country has the largest number of active volcanoes?

Indonesia has the largest number of active volcanoes in Asia, with over 130 active volcanoes.

How is a soft-drink container and magma alike?

Both a soft-drink container and magma can hold liquids, but in very different ways. While the soft-drink container is designed to keep the liquid contained and stable, magma is underground molten rock that can erupt violently as lava during volcanic activity. Both involve the containment and movement of liquids, albeit in different contexts and scales.

Do ocean basin spread uniformly over the entire basin?

No, ocean basins do not spread uniformly over the entire basin. The process of seafloor spreading occurs along mid-ocean ridges where tectonic plates move apart, creating new oceanic crust. This new crust forms in narrow bands along the ridge and spreads outward, leading to a non-uniform distribution of seafloor spreading.

How is the transfer of energy as seismic waves related to the frequency and magnitude of earthquakes in an region?

Seismic waves transfer energy generated by earthquakes through the Earth's crust. The frequency of earthquakes in a region is related to the tectonic activity and fault lines present, with more active regions experiencing higher frequency of earthquakes. The magnitude of earthquakes is related to the amount of energy released during the event, with higher magnitudes indicating a greater release of energy.

What are the three major seismic belts where most earthquakes occur?

The three major seismic belts where most earthquakes occur are the Circum-Pacific Belt (also known as the Ring of Fire), the Alpide Belt, and the Mid-Atlantic Ridge. These regions are characterized by high levels of tectonic activity, with numerous faults and plate boundaries that generate frequent seismic events.

What technology supports continental drift?

The technology that supports the theory of continental drift includes GPS satellite systems, which can track the movement of continents in real time. Additionally, sonar mapping of the ocean floor has revealed evidence of tectonic plate movement and the spreading of the seafloor. Paleomagnetic studies on rocks and fossils have also provided data supporting the movement of continents over time.

What causes a wave-cut notch?

A wave-cut notch is caused by the erosive action of waves pounding against a cliff face over time, leading to the formation of a horizontal groove at the base of the cliff. This erosion is primarily driven by hydraulic action and abrasion, as waves carry sediment and debris that wear away the rock surface.

What is the original definition of seismic gaps?

The theory predicting the relative size and frequancy of earthquakes in a given area, depending on the size and frequency of other earthquakes that have accured in that area. Example:- areas that have experianced many small earthquakes may not ever be likely to experience a large one, although, areas that with go long periods of time without having an earthquake are quite likely to have a large one.

Is a seismic wave a wave of energy produced at the focus of an earthquake as elastic strain is released?

Yes, a seismic wave is a wave of energy that travels through the Earth's crust as a result of an earthquake. It is produced when the stored elastic strain in rocks is released, causing vibrations that propagate through the Earth in the form of waves.

What kind of scale is used to measure the amount of seismic energy released by an earthquake?

Magnitude scales are used to assess the amoiunt of energy relaed by an earthquake. For small and medium strength earthquakes (less than magnitude 7.0) the Richter scale is used. For larger earthquakes than this, the moment magnitude scale is used.

What is beta factor in basin formation in geology?

Beta factor or β is term used in the geology of extensional regimes. A basin is a form of extensional regime. β is the amount of extension that took place, and can either be determined through reconstruction of the faults or by the equation t0/t1 where t0 is the initial crust thickness and t1 the final crust thickness

What is the Name of circulating current of warmer material such as magma?

The circulating current of warmer material such as magma within the mantle is called mantle convection. It is driven by heat from the Earth's inner layers, causing the warmer material to rise and the cooler material to sink in a continuous cycle.

What are facts about the mineral corundum?

  1. Corundum is a crystalline form of aluminum oxide.
  2. It is one of the hardest minerals known, ranking 9 on the Mohs scale of hardness.
  3. Corundum comes in a variety of colors, with red corundum being called ruby and any other color being called sapphire.

The modern-day Red Sea is explained by plate tectonics theory because?

the Red Sea is located along a divergent plate boundary where the Arabian Plate is moving away from the African Plate. This movement causes the two plates to pull apart, creating a rift that is filled with seawater from the nearby Indian Ocean. The ongoing seafloor spreading in this region continues to widen the Red Sea.

The main source of downward convection flow in the mantle is called?

The main source of downward convection flow in the mantle is called "slab pull." This process occurs when a denser oceanic plate sinks into the mantle at a subduction zone, pulling the rest of the plate behind it. This movement helps drive the overall convective flow in the mantle.

How do hotspot volcanoes form?

Super volcanoes can form at hotspots where the earths crust is weak and the upper mantle is hotter than normal Some material melts and rises to the surface. It doesnt necessarily have to be a super volcano. It can be a composite or sheild volcano as well. In fact most volcanoes that form at hot spots are shield volcanoes.

How does a sedimentary rock form a metomorpic rock?

A sedimentary rock can transform into a metamorphic rock through the process of metamorphism. This occurs when the sedimentary rock is subjected to high heat and pressure deep within the Earth's crust, causing physical and chemical changes in the rock's mineral composition and structure. This process can result in the formation of new minerals and textures, transforming the sedimentary rock into a metamorphic rock.

Is Hawaii drifting away?

Hawaii is not drifting away. The islands are situated on the Pacific Plate, which is moving to the northwest at a rate of about 2-3 inches per year. This movement contributes to the formation of new volcanic islands in the Hawaiian chain.

Where do you usually find amethyst rock?

Amethyst rocks are commonly found in geodes, which are round rocks with a hollow cavity lined with crystals. They can also be found in mineral deposits within volcanic rocks or as secondary minerals in hydrothermal veins. Amethyst deposits are often associated with quartz, as both minerals belong to the same family.

Why is sand important?

There are many reasons why, and I have really no clue, but i believe sand is important because of beaches. I love beaches! I'm only doing this because I got bored, so don't use this for science.