Answer: b. comparing the arrival times of the P-and S-waves.
Explanation: The epicenter of earthquakes is the location where the earthquake starts in the earth crust. To calculate the distance to the epicenter of an earthquake, you need to compare the arrival times of the P waves and the S waves. On a seismograph, a line is equivalent to 1 minute but it depends on the scale used.
Determine the magnitude of the earthquake by plotting the distance and amplitude on a chart and joining the two points.
Triangulation is then used to locate the epicenter. Three circles with a radius of the magnitude are drawn around the affected parts. The epicenter is the point where these circles meet.
Answer:
1860s–1890s: The Khodynka Tragedy.
1900–1916: 1905 Revolution and Bloody Sunday | Outbreak of First World War.
1917: February Revolution | June Offensive | July Days | October Revolution | Kornilov affair.
1918–1924: Brest-Litovsk Treaty.
Explanation:
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<span>One significant difference between oceanic and continental crust in terms of the long term evolution of the earth's surface is that in rhwew onwq</span>
the lava and pyroclastic that erupted mount. sakuajima volcano consists of medium- K series and endesite - dacite .the composition clearly differ between eruption periods.
