36. The seismic energy released in an earthquake of magnitude Ms=7.0 is about .........times released in an earthquake of Ms=6.0
A) 10
B) 32
C)64
D)100
B) 32
C)64
D)100
Solution:
Gutenberg devised an empirical formula, which relates the energy
(E) to the surface wave magnitude
(Ms)
log10 E = 4.8 +1.5 Ms -------------------------(1)
log10 E7 = 4.8 + 1.5 M7
log10 E6= 4.8 + 1.5 M6
log10E7 = 4.8 + 1.5 * 7
------------(2)
log10E6
= 4.8 + 1.5 * 6 ------------(3)
Divide equation (2) by equation (1)
log10 E7 / log10 E6 =
15.3/13.8
E7/ E6 = 1015.3 / 1013.8
= 1015.3
– 13.8
=101.5
Therefore.
E7 = 32.62 E6
2019 102) The apparent resistivities measured with wenner and schlumberger
ReplyDeletearrays are the same when equal amounts of currents are passed through current elecyrodes and equal potential differences are developed between potential electrodes.if the wenner arrey electrode spacing is 10m and schlumberger array potential electrode spacing is 20m,the current electrode spacing of the schlumberger array is?
https://gpsurya.blogspot.com/2019/08/gate-2019_88.html
Delete2019 june 95) A seismic source at a depth of 20 m generates a seismic wave which is reflected and recorded at the surface at an offset distance of 30 m,assuming that the horizontal reflector lies at a depth of 30 m and p wave velocity of the medium is 2.5 km/s,the travel time for the reflected wave is(in milliseconds).
ReplyDeletehttp://gpsurya.blogspot.com/2019/11/csir-net-june-2019.html
Delete2019 96)june The travel time difference between p and s arrivals at two stations A and B are 3 and 4 second respectively,while the difference in p wave arrival time between the same stations is 1s.what is the ratio of pwave velocity to that of the s wave velocity?
ReplyDelete2019 95)june given 2 statements
ReplyDeletes1)ScP and PcS phases of near surface earthquake arrive at an observatory at different times.
s2)ScP PHASE of a deep focus earthquake arrives earlier than Pcs phase at the same obsevatory
Vcintainpi_West Valley City Irla Burns Crack
ReplyDeleteboatratealin