An earthquake was measured by a seismograph 180 kilometers from the epicenter that recorded a maximum of 0.5 µm. Find the magnitude of the earthquake. A1Formulas: M = log A – log AoM1 – M2 = log ()log E - 11.8 + 1.45MA2Richter's Standard Earthquakedistance (km)log of amplitude -1.7 -2.8 -3.0 -3.2 -3.4 -3.6 -3.8 -4.0 -4.22060100 140180 220 260 300 340D = 10 logIoIo = 10-16 watts/cm?10 logI2стD1 – D2

Magnitude of earthquake can be obtained as:log of ampltitude at distance of 180km from standard…

Answered: An earthquake was measured by a…

An earthquake was measured by a seismograph 180 kilometers from the epicenter that recorded a maximum of 0.5 µm. Find the magnitude of the earthquake.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

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An earthquake was measured by a seismograph 180 kilometers from the epicenter that recorded a maximum of 0.5 µm. Find the magnitude of the earthquake.

A1
Formulas: M = log A – log Ao
M1 – M2 = log ()
log E - 11.8 + 1.45M
A2
Richter's Standard Earthquake
distance (km)
log of amplitude -1.7 -2.8 -3.0 -3.2 -3.4 -3.6 -3.8 -4.0 -4.2
20
60
100 140
180 220 260 300 340
D = 10 log
Io
Io = 10-16 watts/cm?
10 log
I2
ст
D1 – D2

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