Seismometer

In the same manner, the breakage of rock during an earthquake produce vibrations called seismic waves that radiate outward from the point of fracture. Provided that, the instrument used to record and measure these vibrations is called a seismograph ( EarthquakesCanada, 2013 ). About 132 A.D. , Chang Heng, a Chinese astronomer and mathematician, invented the first seismometer. ( Duncan, 2014). For the most part, seismographs are securely fixed to the surface of the Earth. ( Than, 2010). In general, a modern seismograph includes five basic pieces (Figure 2): a clock, a sensor called a seismometer,an electronic amplifier, a seismogram that traces a chart, and a data recorder that saves the information for later examination. The clock records precise arrival times of certain seismic waves. Furthermore, the seismometer measures the shaking strength at the instrument 's location and compares the motion of a support structure that shakes with the land surface to a pendulum. Finally, the recorder registers seismic signals and vibrations with a pen attached to the pendulum, and a roll of paper that moves…

Earthquake Alarm Can you locate an earthquake? How about read its frequency? Alert others of it? You may not be able to do things like that, but there is a machine that can. Learn about this invention as you read about the ancient seismograph. With today’s advanced technology, you wouldn’t be surprised that there would be a machine that can do things such as locate earthquakes before getting struck. But can you believe this invention was created during ancient times? The invention…

feature is that the moon has a much smaller magnitude of freely vaporized ingredients (like water) than Earth (Bennett, 2009). The “great impact” explanation of the formation of Earth’s Moon is still a hypothesis and the formation of Earth’s Moon remains uncertain. The Apollo Moon Landing Program was a U.S effort that was designed to land humans on the Moon and return them safely to Earth with a better understanding of the Moon. Many Apollo flights were tested to run orbit tests. The first…

They happen in these countries because they are on fault lines (lists10.com). We measure earthquakes by the Richter scale. The Richter scale measures earthquakes by magnitude on a scale from 1-10. The magnitude is based on the size of the largest wave recorded on a seismometer. Seismometers are instruments that detect and record ground vibrations. The lower magnitude earthquakes are usually not felt by people and the higher magnitude earthquakes could be very destructive (Michigan Technological…

mean that volcanic activity is increasing. Another way is to measure the amount of sulfur in the gas released by the volcanoes. As a volcano gets closer to erupting, it will start to release gases. The higher the sulfur content is in the gases the closer it is to erupting. Also hundreds of tiny volcanoes can happen around a volcano because magma is rising up through cracks in the Earth’s crust. These are not the only ways to predict if a volcano will erupt there are also several machines that…

Canada is located near and on many fault lines. With fault, lines energy builds up and has to be expelled in the form of an earthquake. The regions for seismic activity in Canada are: the Cordillera region, British Columbia, the Arctic and to a smaller extend, and central Quebec. More than 4,000 earthquakes occur in Canada every year. The western regions are the most seismically active region in Canada. More than 100 earthquakes with a magnitude of 5 or more have occured in Canada over the past…

sliding 165 feet (Oskin, 2013). The epicenter is 43 miles off the coast of Japan with a hypocenter 19 miles below. (IMAGE 1.3: The epicenter is 43 miles off the coast) Tokyo, 231 miles from the epicenter, received one minute of warning before the second waves hit the city. The warning worked and saved many lives during the terrifying 6 minutes of shaking. The “Earthquake Early Warning” is a highly valuable system used in Japan to send warning out to its people. More than 4,000 seismometers…

Even one seismometer can tell if there is an increase of seismic activity on a usually quiet volcano. Another type of data that is used is the study of ground deformation. When magma moves up into the shallow plumbing of a volcano, it takes up space and pushes the surrounding rock outward. The driving force behind the eruption of Krakatoa was the subduction of the Indo-Australian tectonic plate as it moved northward toward Asia. The eruption of Krakatoa was the largest natural disaster of the…

How do scientists known what the center of the earth is? There 4 ways how scientist found out about the center of the earth ( aka inner core and outer core). Answer 1: Geologists hypothesize that the Earth's center is composed of predominantly iron. The outer portion of the center, known as the "outer core", is thought to be liquid iron. While the interior portion of the center, known as the "inner core" is thought to be solid iron. Answer 2: The main evidence for the structure of the Earth…

plates don't move smoothly which allows pressure and tension to build and in the end it is the rapid release of energy that allows an earthquake to occurs. It is the place called focus in the earth where it starts and the point on the earth surface is called epicentre. Earthquakes release seismic waves through the rock and the water, which then leads to damage of the area around it as it shakes the ground. The areas closer the epicentre is more severely damage than other areas nearby as the…