What is the fewest number of seismographic stations that must record the arrival time of p and s waves in order for the epicenter of an earthquake to be located?

Answers

Answer 1

Answer:

3

Explanation:

The process is called triangulation and involves at least 3 stations.

The principle is that from each station, you get a distance location from that station of the event. Then from each station you make a circle with the distance measured at that station.

All three circles done form the monitoring station will meet at a point somewhere between those three stations, and you'll get your location.

That's the triangulation process.  You do need 3 points for a precise reference, if you have only 2, you are usually left with 2 possibilities.


Related Questions

What is contained in the nucleus of a comet?

Answers

Answer:

rock, dust, and frozen gases

Explanation:

How many miles of coastline does florida have

Answers

1,350 miles, or 2,170 kilometers in total
1,350 miles. Or 2,170 kilometers.

The hottest place in the universe is located in which constellation

Answers

The answer is Virgo hope this helped

Holland is another name for which country?

Answers

Answer:

Netherlands

Explanation:

Netherlands, also known as Holland, is home to the Dutch people. It is part of the Benelux trio, and it is located in Western Europe. The country has access to the North Sea and it has been of great importance for its economic development. This country is actually the country that has the lowest average elevation, which makes it very vulnerable to floods. In order for the people to get protected, they actually started to create more land in the sea, making their territory larger, and also put barriers to stop any incoming waters, these artificial pieces of land are called polders. It is a country that is in the category of more developed countries, being heavily industrialized, with strong and progressive economy, and highly skillful labor force.

What are the two possible fates of the universe?

Answers

Answer:

1) The Big Crunch. 2) The Big RIP.

Explanation:

For The Big Crunch is that's where gravity takes. For The Big RIP is where the expansion of the universe just gets faster until galaxies, planets, stars, atoms and space gets ripped apart.

There's two possible fates for the universe, one is called the Big Crunch, where gravity takes over and begins to pull the cosmos back, compressing to one point. Another extreme is the Big Rip, where the expansion of the universe just gets faster until galaxies, stars, planets, atoms and space itself is ripped apart.

How many states share a border with mexico

Answers

The correct answer is four states.
California
Arizona
New Mexico
Texas

What foreign country borders north dakota?

Answers

North Dakota borders Canada.

The two main types of glacial erosion are abrasion and A. saltation. B. flowing. C. plucking. D. sliding.

Answers

Answer:

The two main types of "glacial erosion" are "abrasion and plucking".

Explanation:

Out of the three most "significant types of glacial erosion", abrasion and plucking are the most important ones. Erosion due to abrasion is said to have occurred when the ice from the glacier rakes against a rock and causes the rock to fragment down. Glacial erosion due to plucking occurs when the ice from the glacier slides between the cracks in the rocks and cause the cracks to enlarge.This action of the glacier ice eventually plucks off smaller pieces of rocks from a larger rock causing of the rock to erode.

The image shows a high-elevation, low-relief landform with a river flowing over it.


Which type of landform is shown?


hill

mountain

plains

plateau

Answers

Answer:

plateau

Explanation:

Let's see the possible answers:

hill : No. A hill is a relatively small and round relief on a normally flat area.  Not the case here... especially since the question mentions a low-relief.

mountain : No.  A mountain is a big relief, much bigger than a hill... with steep sides and a summit...  again, nothing like a low-relief.

plains : No.  Although plains are also flat, they are low-elevation, think about fields for growing crops.  

plateau: Yes.  A plateau is a relatively flat (low-relief) that is significantly elevated compared to its surroundings.  Drops from a plateau is usually the best scenario for a waterfall, like on this picture.

Answer: plateau

Explanation:aka D

A principal methodology governing geographic inquiry A)is behavioral analysis. B) involves spatial analysis. C)uses chronological organization. D)is field work

Answers

Answer:

A principal methodology governing geographic inquiry involves spatial analysis. B)

A principal methodology governing geographic inquiry is involving spatial analysis. Thus, option (b) is correct.

Geographic inquiry entails the methodical examination of geographical trends, links, and correlations between various geographic components.

Its main goals are to comprehend how phenomena are distributed throughout space, analyse how features are organized spatially, and investigate how spatial elements affect both natural and human systems.

In order to analyse and interpret geographic data, such as maps, satellite images, and geographic information systems (GIS), spatial analysis uses a variety of tools, techniques, and technologies.

As a result, the significance of the principal methodology governing geographic inquiry are the aforementioned. Therefore, option (b) is correct.

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What is the second largest city in the united states

Answers

Answer:

Los Angeles, CA. Population: 3,971,883

Final answer:

The second largest city in the United States is Los Angeles, California. Despite being a major urban hub, it's outranked by New York City. The fourth major city in terms of population is Houston, Texas.

Explanation:

The second largest city in the United States is Los Angeles, located in the state of California. It's a massive urban area, often referred to as a Combined Statistical Area (CSA), home to approximately 18.35 million people. However, the City of Los Angeles itself contains around 3.8 million residents. The largest city in the U.S. is New York City, with a CSA population of about 23.5 million people.

Los Angeles has seen significant growth and is a major hub for several industries. It's worth mentioning that Houston, Texas is the fourth largest city in the U.S. and the largest in Texas, with a rapidly growing population of over 2.2 million people. Yet, it holds less population than both New York City and Los Angeles.

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When traveling north what direction is to the left

Answers

Answer:

West

Explanation:

                            N

                             |

                         W - E

                             |

                             S

When you are facing north, if you turn left, you will be facing West. If you turn right, you will be facing East. If you turn around fully, you will be facing South.

Mordancy.

The west direction comes to the left while traveling towards the north.

What is a compass?

A compass is an instrument that is used to detect the location. It shows four directions namely, north, south, east, and west.

At the time of traveling in the north direction, then there are three possible directions comes:

It will be a West direction if a person turns toward the left.It will be an East direction if a person turns toward the right.It will be a South direction if a person turns toward all around.

Therefore, whenever a person travels towards the north, then the West direction comes to his/her left.

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How big is the Great Pacific Garbage Patch 2018?

Answers

Answer:

1.6 million square km

Explanation:

The Great Pacific Garbage Patch is an excellent proof of how much the humans are damaging the environment, and how little they actually care about it. The biggest ocean on the planet, the Pacific Ocean, has a garbage patch that is estimated to be 1.6 million km in size. To put into a perspective, that's approximately twice the size of Texas. That data is from 2015 though, so the chances are that in the present the garbage patch is even bigger. The Great Pacific Garbage Patch comes to literary be a slow moving island of garbage. It is around 3.5 meters deep, and it contains around 7 million tons of garbage, the majority of which is plastic. This garbage patch actually has so much plastic that it outnumbers the plankton in the Pacific Ocean. The fish that lives around it, as well as the other marine life, are badly affected, and around 8% of them actually have plastic in them because of it.

+SUPER HARD+

Which of the following statements is not true of Vienna?
a.
It is the capital of Austria.
b.
Very little historic landmarks exist there because of fires set in World War II.
c.
Many great artists and classical composers have lived there.
d.
It is the largest city in Austria.

Answers

Answer:

b. Very little historic landmarks exist there because of fires set in World War II

Explanation:

Vienna is considered as one of the most beautiful cities in the world. It is a city with long tradition of being a cultural center as the city was just packed with great minds from all fields. That also led to building of very beautiful architecture. The World War II was threat, but Vienna was not badly affected by it, and the city managed to preserve its historic landmarks. It is actually one of the best preserved cities in the world when it comes to old architecture, and there has been lot of effort put in it. It is no wonder that it is the capital of Austria, still is seen as a cultural center, and being one of the most attractive cities to visit in the world.

What is the tallest structure in washington dc

Answers

Answer:

Washington monument  

Explanation:

What causes the temperature to decrease with height in the troposphere?

Answers

We have all noticed that if we hike from a place with low elevation and go up at a place with high elevation, that the temperature is gradually dropping, thus giving us a clue that the lower places are warmer, while the higher places are cooler. The reason for this, even though both the places with low and high elevation are located in the troposphere, thus the same atmospheric layer, is that the density of it is not the same everywhere. The troposphere has the highest density at its lowest points, and as the height increase the density decreases. Since the higher parts are less dense, that means that there are less gases, thus there are less molecules that are further apart from each other. This results in lesser absorption of heat, so this parts are cooler, while the lower parts are warmer because the troposphere is denser, there's more molecules that are also closer to each other, thus they absorb more heat.

What is one thing that can affect the way that clouds form?

Answers

Answer:

Mountains or other topography

Explanation:

This makes sure the air rises and cools in temperature, but because they cant hold that much of the water they form into clouds.

What were the military strategies of the north and south at the outset of the civil war

Answers

The north had the Anaconda plan, Total war. The south had good defensive war side. The south knew the land a whole lot better than the north did.

Which statements did both Aristotle and Ptolemy assume? Check all that apply.

The Sun was the center of the solar system.
Bodies in space traveled in circles.
Epicycles explained the “looping” movement of the planets.
The planets revolved around the Earth.
The stars in the sky are other suns.

Answers

Aristotle and Ptolemy were some of the earliest astrologers in the world and based on their observations of the world at the time, they concluded that:

Bodies in space traveled in circles.  The planets revolved around the Earth

Aristotle and Ptolemy observed that some planets would appear to be ahead in the sky and then after some months, they would be behind. This led to them decide that planets revolved around the earth and that the Earth was the center of the solar system.

They also believed that movements of those planets was in a circular motion around the Earth. These conclusions were preferred for over a thousand years until the modern era.

In conclusion, Aristotle and Ptolemy believed that the planets moved in a circular pattern around the Earth.

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Answer:

B, D

Explanation:

Which statement about the cosmic microwave background isnottrue?A) It is the result of a mixture of radiation from many independent sources, such as stars andgalaxies.B) It is thought to be radiation that began its journey to our telescopes when the universe wasabout 380,000 years old.C) With the exception of very small variations, it appears essentially the same in all directions inwhich we look into space.D) Its spectrum corresponds to a temperature of just under 3 degrees above absolute zero.

Answers

Answer: It is the result of a mixture of radiation from many independent sources, such as stars and galaxies.

Microwave background radiation is a form of electromagnetic radiation that is present in the whole universe and completely fills it. In fact, it is the leftover radiation from the Big Bang that occurred 400,000 years before the events related to this cosmic radiation.

Its frequency belongs to the microwaves range and is one of the main demonstrations of the of the Big Bang theory model.  

Final answer:

The incorrect statement about the cosmic microwave background is A: it is actually not a mixture of radiation from independent stars and galaxies, but the aftreglow from the Big Bang.

Explanation:

The statement about the cosmic microwave background (CMB) that is not true is A) It is the result of a mixture of radiation from many independent sources, such as stars and galaxies. The CMB is thought to be evidence of the Big Bang, which is the event that started the universe.

It is an afterglow of sorts from when the universe was just about 380,000 years old (Statement B). It is almost uniform in all directions (Statement C) and its spectrum corresponds to a temperature just under 3 Kelvin, just above absolute zero (Statement D).

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Why do tropical communities tend to have greater species diversity than temperate or polar communities?

Answers

Answer:

Tropical climates are better suited for a multitude of species of plants and animals.

Explanation:

The reason for this is tropical climates are easier to handle then harsh winters because almost all tropical climates are near the equator so it tends to stay warmer year round creating a year round growing period. Polar climates are harsher on the plants than the animals. Also consider this the fact that there would be no herbivore animals for predators to eat so that limits what can grow in the polar climates.

This image shows a volcanic eruption in Hawaii with lava flowing into the sea.



Which statements best describe this eruption? Check all that apply.


Its magma is high in silica.

Its magma has low viscosity.

Its lava came from a quiet eruption.

Its lava sets fire to everything in its path.

Its lava came from an explosive eruption.

Answers

Answer:

- Its magma has low viscosity

- Its lava came from a quiet eruption

- Its lava sets fire to everything in its path

Explanation:

From this image, we can see that the volcano had an eruption from which it produced lava flows that managed to reach the sea. Since the volcano managed to release such large amount of lava, and the lava managed to pass several km to reach the sea, it means that the magma had low viscosity, thus it is low on silica content. Also, the low viscosity of the magma means that the gases have not been trapped in it, so the eruption of the volcano was a quite one. The lava is very hot, so it manages to set on fire everything on it path, though it immediately moves over the thing it set on fire.

Answer:

(B) Its magma has low viscosity

(C) Its lava came from a quiet eruption

(D) Its lava sets fire to everything in its path

Explanation:

What are the 3 regions of north carolina?

Answers

Answer:

If this is what you meant:

Coastal Plain, Piedmont, and Mountains

What type of geography studies all of the natural occurrences on the planet

Answers

Answer:

2500 dollars

he paid the price so...

What country is shaped like an elephants head?

Answers

Answer:

india

Explanation:

thailand is shaped like and elephant.

Which of the following geologic events can occur at a transform boundary?a. Earthquakeb. Mountain formationc. Volcanic eruptiond. Rift formation

Answers

Answer:

a. Earthquake

Explanation:

The transform fault plate boundaries are plate boundaries that are formed where there's plates to slide past each other. Basically there's no real collision between the plates because they move in opposite directions but parallel to one another. Despite the lack of direct collision, the plates still create a lot of pressure between each other on the contact zone. This intense pressure results in the formation of cracks in the crust, some of which are parallel to the boundary and are manifested on the surface as faults, while some are cracks deep inside the crust and create adjustments. The adjustments of the crust deep inside it release lot of energy, and that energy is manifested through strong, destructive vibrations, known as earthquakes.

Final answer:

An earthquake is the geologic event typically associated with a transform boundary, such as the San Andreas Fault in California. Transform boundaries involve lateral plate movement, leading to earthquakes when built-up strain is released.

Explanation:

The geologic event that commonly occurs at a transform boundary is an earthquake. At transform boundaries, two tectonic plates slide past one another. This lateral movement can build up strain in the adjacent crustal regions, leading to earthquakes when the strain is released and the plates grind against each other. A well-known example is the San Andreas Fault in California. Transform boundaries are not typically associated with mountain formation, volcanic eruptions, or rift formation, as these events are more common at convergent and divergent plate boundaries. Volcanic eruptions generally occur at divergent plate boundaries, like mid-ocean ridges, or at convergent boundaries where subduction takes place. Mountain formation is also mostly linked to convergent boundaries where two plates collide. Finally, rift formation occurs at divergent boundaries where plates move away from each other.

Why would an engineer most likely use topography maps in his or her work?

1) to find an area used for camping
2) to define a political boundary line
3) to determine the best location for a new road
4) to find the ideal place to hike on a mountain

Answers

Answer:

3) to determine the best location for a new road

Explanation:

Since the question indicates the person using the topography map is an engineer, we have to assume it's for a use related to work... otherwise the question would have said "someone".

1) to find an area used for camping

That's a valid use for a topography map, but not a work-related one.

2) to define a political boundary line

That's also a valid use of a topography map, but it wouldn't be used for that by an engineer, more like a politician since it would be about political border.

3) to determine the best location for a new road

YES.  That's a valid use and it's a professional use related to an engineer, a civil engineer in this case.

4) to find the ideal place to hike on a mountain

Another valid use, but not specific to work.

Turns out, all four possible answers are valid uses of a topography map, but only one related to engineer work.

Answer:c

Explanation:

What is the difference between cultural diffusion and cultural convergence

Answers

Answer: Results in two cultures becoming more different

Explanation:

Final answer:

Cultural diffusion involves the spread of cultural elements between societies, while cultural convergence refers to the merging and assimilation of different cultural practices. Cultural diffusion occurs through contact and interaction, whereas cultural convergence is influenced by globalization and increased interconnectivity.

Explanation:

Cultural diffusion refers to the spread of cultural customs, ideas, and practices from one society to another through contact and interaction. It can occur through migration, trade, or communication, and often results in the adoption and blending of different cultural elements.

Cultural convergence, on the other hand, refers to the process where diverse cultural practices, beliefs, and traditions become more similar or merge together. This can be influenced by globalization, technology, and increased interconnectivity between societies.

So, while cultural diffusion involves the movement and exchange of cultural elements, cultural convergence focuses on the gradual assimilation and similarities between different cultures.

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Why did Brazil begin a road construction program? to develop trade networks to connect Brasilia with other regions to connect commercial farms to connect coastal cities

Answers

Answer:

To connect Brazilia with other regions.

Explanation:

How many animals live in the ocean and what percentage of the ocean has NOT been discovered?

Answers

Answer:

An estimated 50-80% of all life on earth is found under the ocean surface and the oceans contain 99% of the living space on the planet. Less than 10% of that space has been explored by humans.

Explanation:

Scientists now estimate that 80 % of Earth's species live on land, 15 % in the ocean, and the remaining 5 % is freshwater.

More than eighty percent of our ocean is unmapped, unobserved, and unexplored

What is the ratio of land to water on Earth?

In simplest terms, water makes up about 71% of the Earth's surface, while the other 29% consists of continents and islands.

Area of land: 148 326 000 km2 (57 268 900 square miles), this is 29% of the total surface of Planet Earth. Area of water: 361 740 000 km2 (139 668 500 square miles), this is 71% of the total surface of the Earth. 97 % is salt water and only 3 % is fresh water.

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