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Start by thinking about these questions: who has felt an earthquake? What do we know about earthquakes? What famous earthquakes have happened in our history? Scientists use seismographs to record when and where earthquakes happen. Real seismographs are complicated instruments with weights, levers, and motors. We
Apr 24, 2024 · To determine the intensity of an earthquake, reports are collected about what people felt and how much damage was done. The reports are then used to assign intensity ratings to regions where the earthquake was felt.
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How do scientists measure earthquakes?
What are earthquake magnitudes & intensity?
What determines the intensity of an earthquake?
How are earthquake magnitudes determined?
II. Then comes the fun part: how to rate intensity, or strength of the quake. I. The Richter Scale. O Measures an earthquakes MAGNITUDE, or total energy released. O Logarithmic scale – which means that every level increases by multiples of 10. O That means a level 2 is 10x stronger than a level 1 on the Richter Scale. II.
Apr 24, 2024 · This is known as intensity. Intensity values are assigned to locations, rather than to the earthquake itself, and therefore intensity can vary widely, depending on the proximity to the earthquake and the types of materials underneath and the local conditions.
In contrast, the dense ball and attached pen do not. See text for additional discussion. A typical record collected from a seismograph is shown in Figure 8. Note that the x‐axis of the record is time while the y‐axis is amplitude, a measure of the size of the seismic waves. Figure 8.
Today, we will learn one method used to measure earthquakes. An earthquake’s magnitude is a measurement of the amount of energy released by an earthquake. A seismograph is an instrument used to record the motion of earthquake waves. 2. Show students the ‘Seismographs’ transparency. Here we have three different seismographs.
Learners will be able to: Identify P-waves and S-waves on seismograms. Compare P-wave and S-wave arrival times to rank the distances from the earthquake epicenter to the seismometers. Compare amplitudes of seismic waves to evaluate the differences in shaking intensity experienced by seismometers.
