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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 is seismic damper?

A seismic damper is a device used in structural engineering to reduce the effects of seismic activity on buildings and other structures. It absorbs and dissipates the energy generated by an earthquake, thus helping to protect the structure from damage. Seismic dampers can come in various forms, such as fluid viscous dampers or friction dampers.

What keeps the inner core solid?

The solid nature of the inner core has to do with temperature and pressure. The inside of the earthâ??s core is much hotter than the liquid that is outside the core. Typically, solids tend to be much more dense than liquids because they are packed more tightly.

What are the reasons for the occurence of earthquakes?

the plates under the ground (continental plates) are pushing on each other all the time, and when an earthquake occurs that's when the plates are rubbing on each other or snapped. an earthquake can not be predicted. the epicenter is the place above the ground where the plates colide.

the plates under the ground (continental plates) are pushing on each other all the time, and when an earthquake occurs that's when the plates are rubbing on each other or snapped. an earthquake can not be predicted. the epicenter is the place above the ground where the plates colide.

Who is leopoldo uichanco?

There is limited public information available on an individual named Leopoldo Uichanco, so it is difficult to provide specific details. It is possible that he may not be a well-known public figure or have a significant presence in widely accessible sources.

What can rock foliation tell us?

Rock foliation is the result of pressure and recrystallization when rocks undergo metamorphosis. It is the layering and parallel alignment of flattened or directionally oriented mineral crystals. Slate, phyllite, schist, and gneiss are all metamorphic rocks with foliated texture.

How is heat transferred through a radiator?

Heat is transferred through a radiator primarily by convection. As hot water or steam flows through the radiator, it warms the metal fins of the radiator. The warm metal then heats the surrounding air, which rises and creates a convection current, transferring heat into the room.

Has the world ever stopped spinning?

No. The world was formed from matter in the accretion disc around the sun as it formed. So the Earth was spinning during formation and has never stopped. Tidal effects from the Moon have slowed the spin rate, and at some point it will slow until it matches its rate of rotation around the Sun (resulting in one side aways facing the sun, and one side always facing away). But even then it will still be spinning, just more slowly.

What are foliation and banding?

Foliation is a parallel arrangement of mineral grains or structural features in a rock, usually resulting from the application of directed pressure during metamorphism. Banding refers to the visible layers or stripes of different mineral composition or color in a rock, typically formed due to variations in mineral content or processes of deposition. Both foliation and banding provide valuable information about the history and formation of the rock.

What is the difference between the two parts of longitudinal waves?

Because the Analyzed waves converted into the constant force of Consulted Created forces which Escalated into Formatted and Integrated power Maintained.

With elctro programs Programmed to Supported the Troubleshooted magnetics causing it to explode with hydro power waves.

What is a terrestrial hazard?

A Tectonic Hazard is caused where two plates meet, these plates are platforms of rock that move on the convewction currents created by the earths core; they are known as tectonic plates. Tectonic hazards are the most obvious in the form of volcanoes and earthquakes, however they can also be other events that are linked to Earthquakes and volcanoes such as tsunamis.

Based on your surrounding areas geography what might your yard or street have looked like a million years ago?

A million years ago, the yard or street may have been part of a different landscape, perhaps connected to a larger forest, savannah, or even underwater environment. It could have been inhabited by prehistoric plants and animals that are now extinct, like dinosaurs, ancient trees, or even marine life if the area was once covered by water. The geological features may have also been different, with potentially different weather patterns and natural events shaping the land over time.

What is the frequency of seismic wave?

From what I have studied online and heard from news reports, tsunamis happen fairly frequently, but are ususally small.

The last tsunami on par with the Indian Ocean tsunami was in the 1500's. These tsunamis wiped out entire cities and villages and the wave reached about 30 meters in height.

So huge killer tsunamis happen about once every 500 years.

The average tsunami is usually more like 1-2 meters high. Still just as deadly if you are on the shore.

These smaller tsunamis happen roughly every 5 years, but they aren't always reported in the news because they don't affect enough people to be worth reporting....sad as that is to say.

Medium sized tsunamis (like the one that hit Hawaii in the 1960's) usually occur about once every 100 years. They tend to coincide with greater seismic activity and can come more frequently during one century and then fall off in frequency during another century.

So it is a good bet that a person alive today will hear about a tsunami if he or she is tapped into the right information networks.

I should emphasize that while I believe that what I am reporting here is roughly accurate, I am not an expert in oceanography and it would be wise to consult an expert.

But I think I am pretty close to the mark.

What does mean offset in the seismic data?

In seismic data, offset refers to the distance between the source of the seismic energy (such as a vibrator or explosive) and the receiver. It is an important parameter used in seismic data processing and interpretation to determine the depth and properties of subsurface geological structures. Offsets can vary depending on the survey design and objectives of the seismic study.

What is Tau p domain in seismic data?

It is a type of Radon transformed data. In tau-p domain it is easy to delineate the events form the multiples and hence its is easy to identify and remove the multiples. This data again transformed back to X-T domain.

What are some good things about quartz?

Quartz is a durable and low-maintenance material that is resistant to stains and scratches. It comes in a wide variety of colors and patterns, making it easy to find a style that fits your design preferences. Additionally, quartz is non-porous, which makes it hygienic and resistant to bacteria growth.

Definition of marshy soil?

Marshy soil is a type of soil that is waterlogged and characterized by having high organic content. It is typically found in low-lying areas near water bodies such as marshes, swamps, and wetlands. Marshy soil is often spongy and can be a challenge for construction and agricultural activities.

What is the weather usually in October?

I wonder if you're thinking about coming to Sydney for the World Masters Games in October 09.

Anyway, there's some good info about the weather in Sydney in October at http://www.sydneyworldmasters.com. Links to several weather sites are there.

How did hutton and lyell describe geological change?

Both James Hutton and Charles Lyell are considered the fathers of uniformitarianism geology. Uniformitarianism geology is all that has been taught since shortly after the word geology was coined in 1778. Although catastrophism geology is alive and well among many geologists, currently the word geology connotes uniformitarianism.

It is not that Hutton and Lyell are competing for the title of father. James Hutton is credited with lying the foundation of uniformitarianism geology by questioning the then current belief that the sedimentary rock strata was laid down by Noah's worldwide flood. Hutton saw evidence of multiple deposition events and subsequent upheavals and igneous intrusions that revealed a long history of the earth. Although it would appear that much of that evidence would point to catastrophism, Hutton saw only uniformitarianism.

Although 45 years went by before Hutton's ideas really had a significance influence, at that time, Charles Lyell added a chronology of the rock layers called the geologic column and added age dates and names to the layers. So Hutton laid the conceptual foundation for uniformitarianism geology and Lyell built the structure of geology upon that foundation.

The uniformitarianism concept, along with its mandatory accompanying old earth philosophy, provided the primary influence for Charles Darwin and his theory of evolution. Together these ideas have caused a paradigm shift from a biblical creationist, young earth worldview to a humanistic, evolutionary old earth worldview

A pole reversal is when Earth's?

magnetic field flips its polarity, so that the magnetic north and south poles switch places. This process is natural and has happened many times throughout Earth's history. Reverse pole fluctuations have occurred roughly every 200,000 to 300,000 years.

Does water or soil lose heat faster?

Soil will lose heat faster than water.

This depends on the specific heat of the two substances you are comparing. Specific heat of a substance is the amount of energy required to raise its temperature by 1 degree celsius. It also describes the amount of energy the substance would have to lose to change the temperature by one degree.

The specific heat of water is unusually high (1 calorie/gram of water). The specific heat of granite, which is similar to the specific heat of soil minerals, is only 0.19 calorie/gram of granite).

Dry soil will lose heat more slowly than wet soil.

Could releasing of geothermal energy from within the Earth's core cause a geological implosion of the Earth or in other words suck the surface of the Earth into its own core?

No, the release of geothermal energy from within the Earth's core cannot cause the Earth to implode or for the surface to be sucked into the core. Geothermal energy is released naturally through volcanic activity and geothermal power plants, and while it can cause eruptions or earthquakes, it is not powerful enough to implode the Earth. The Earth's structure is stable enough to withstand these natural processes.

What degrees are required to become a Geophysicist?

This field in general falls under geoscientists. Therefore, the following is written by and according to the U.S. Department of Labor and particular to the education and training required for a geoscientist.

A master's degree is the primary educational requirement for most entry-level positions. A Ph.D. is necessary for most high-level research and college teaching positions, but a master's degree is preferred for most other geoscience jobs. Education and training. A bachelor's degree is adequate for a few entry-level positions, but most geoscientists need a master's degree in geology or earth science. A master's degree is the preferred educational requirement for most entry-level research positions in private industry, Federal agencies, and State geological surveys. A Ph.D. is necessary for most high-level research and college teaching positions, but it may not be preferred for other jobs. Many colleges and universities offer a bachelor's or higher degree in a geoscience. Traditional geoscience courses emphasizing classical geologic methods and topics (such as mineralogy, petrology, paleontology, stratigraphy, and structural geology) are important for all geoscientists. People who study physics, chemistry, biology, mathematics, engineering, or computer science may also qualify for some geoscience positions if their course work includes geology. Licensure. A number of States require geoscientists who offer their services directly to the public, particularly geologists, to obtain a license from a State licensing board. Licensing requirements vary but often include education, experience, and a passing score on an examination. Other qualifications. Computer skills are essential for prospective geoscientists; students who have experience with computer modeling, data analysis and integration, digital mapping, remote sensing, and Geographic Information Systems (GIS) will be the most prepared entering the job market. Knowledge of the Global Positioning System (GPS)-a locator system that uses satellites-has also become essential. Some employers seek applicants with field experience, so a summer internship is often helpful. Geoscientists must have good interpersonal skills because they usually work as part of a team with other geoscientists and with environmental scientists, engineers, and technicians. Strong oral and written communication skills also are important because writing technical reports and research proposals and explaining research results in person are important aspects of the work. Because many jobs require foreign travel, knowledge of a second language is becoming increasingly beneficial. Geoscientists must be inquisitive, able to think logically, and capable of complex analytical thinking, including spatial visualization and the ability to infer conclusions from sparse data. Those involved in fieldwork must have physical stamina. Advancement.Geoscientists often begin their careers in field exploration or as research assistants or technicians in laboratories or offices. As they gain experience, they get more assignments that are difficult. Eventually, some are promoted to project leader, program manager, or to a senior research position. Those who choose to work in management will spend more time scheduling, budgeting, and reporting to top executives or clients. (See the statement on engineering and natural sciences managers elsewhere in the Handbook.) For the source and more detailed information concerning your request, click on the related links section (U.S. Department of Labor) indicated below this answer box.

What will happen to Australia if plate movements continue?

I believe all the continets will continue to seperate and over lots of time, they will all connect again but on the opposite side of the earth. All the continets were 1 at a time and slowly seperated to make them Individual continets. If they keep doing this, a pattern will occur and 1day all the continets will be connected once again.