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Earthquakes occur when energy in the earths crust is suddenly release
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Updated on: 30 Sep 2023, 02:58
Updated on: 30 Sep 2023, 02:58
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Earthquakes occur when energy in the earth’s crust is suddenly released, forcing tectonic plates to shift. Earthquakes are classified as foreshocks, main shocks, or aftershocks. What differentiates one category from another is their relation to each other in space and time. A foreshock is only a foreshock if it occurs before a bigger quake on the same fault system. Similarly, an aftershock occurs only after a bigger quake on the same fault system. Interestingly, the probability that an earthquake will trigger a bigger earthquake does not depend on the magnitude of the first earthquake, but rather is related to the location of that first quake and its interaction with the fault system.
In the first column, indicate the statement that the given information most strongly suggests is true. In the second column, indicate the statement that the given information most strongly suggests is false. Make only two selections, one in each column.
In the first column, indicate the statement that the given information most strongly suggests is true. In the second column, indicate the statement that the given information most strongly suggests is false. Make only two selections, one in each column.
| True | False | Statement |
| All main shocks are preceded by foreshocks. | ||
| All main shocks are followed by aftershocks. | ||
| Aftershocks are more common that foreshocks. | ||
| Foreshocks are generally weaker than aftershocks. | ||
| Main shocks can be triggered by foreshocks. | ||
| An aftershock can be a bigger earthquake than the main shock that preceded it. |
Originally posted by siddharth86 on 03 Feb 2013, 10:16.
Last edited by BottomJee on 30 Sep 2023, 02:58, edited 7 times in total.
Last edited by BottomJee on 30 Sep 2023, 02:58, edited 7 times in total.
Added OA
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Joined: 24 Aug 2009
Posts: 388
Schools:Harvard, Columbia, Stern, Booth, LSB,
Re: Earthquakes occur when energy in the earths crust is suddenly release
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03 Feb 2013, 10:34
03 Feb 2013, 10:34
siddharth86 wrote:
Earthquakes occur when energy in the earth’s crust is suddenly released, forcing tectonic plates to shift. Earthquakes are classified as foreshocks, main shocks, or aftershocks. What differentiates one category from another is their relation to each other in space and time. A foreshock is only a foreshock if it occurs before a bigger quake on the same fault system. Similarly, an aftershock occurs only after a bigger quake on the same fault system. Interestingly, the probability that an earthquake will trigger a bigger earthquake does not depend on the magnitude of the first earthquake, but rather is related to the location of that first quake and its interaction with the fault system.
choose 1 statement from each column.
True False Statement
All main shocks are preceded by foreshocks.
All main shocks are followed by aftershocks.
Aftershocks are more common that foreshocks.
Foreshocks are generally weaker than aftershocks.
Main shocks can be triggered by foreshocks.
An aftershock can be a bigger earthquake than the main shock that preceded it.
i will give official answers after some discussion ,which one do you think are the 2 correct statements,this is 1 confusing question.
Thanks and regards,
Sidd
choose 1 statement from each column.
True False Statement
All main shocks are preceded by foreshocks.
All main shocks are followed by aftershocks.
Aftershocks are more common that foreshocks.
Foreshocks are generally weaker than aftershocks.
Main shocks can be triggered by foreshocks.
An aftershock can be a bigger earthquake than the main shock that preceded it.
i will give official answers after some discussion ,which one do you think are the 2 correct statements,this is 1 confusing question.
Thanks and regards,
Sidd
Hi Siddharth,
Try to post complete question (with all the terms) as it help everyone to understand the question completely. I couldn't get the question completely, but still my answers are as follows-
A) Yes
B) No
C) No
D) No
E) No
F) No
Re: Earthquakes occur when energy in the earths crust is suddenly release
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25 Nov 2019, 08:58
25 Nov 2019, 08:58
1
Kudos
False - Main shocks can be triggered by foreshocks.
True -An aftershock can be a bigger earthquake than the main shock that preceded it.
I am not sure about the top four ones,since we can't say anything straight about those
Posted from my mobile device
True -An aftershock can be a bigger earthquake than the main shock that preceded it.
I am not sure about the top four ones,since we can't say anything straight about those
Posted from my mobile device
Re: Earthquakes occur when energy in the earths crust is suddenly release
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17 Jan 2020, 17:48
17 Jan 2020, 17:48
Can anyone give the correct answer for this question, please? I am desperately confused at the answers (if it is the correct answer) provided.
Re: Earthquakes occur when energy in the earths crust is suddenly release
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18 Jan 2020, 10:20
18 Jan 2020, 10:20
1
Kudos
Expert Reply
lacabral wrote:
Can anyone give the correct answer for this question, please? I am desperately confused at the answers (if it is the correct answer) provided.
This questions originates from Manhattan GMAT and it is not a quality question IMO, i will replace this question with some other question.
https://www.manhattanprep.com/gmat/foru ... 23648.html
Thanks
Re: Earthquakes occur when energy in the earths crust is suddenly release
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18 Jan 2020, 10:36
18 Jan 2020, 10:36
Expert Reply
Here is the replacement of this question, kindly visit below link.
https://gmatclub.com/forum/the-table-ab ... 14646.html
Happy prep.
https://gmatclub.com/forum/the-table-ab ... 14646.html
Happy prep.
Re: Earthquakes occur when energy in the earths crust is suddenly release
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10 Jan 2021, 08:40
10 Jan 2021, 08:40
Expert Reply
Official Explanation
Evaluate each answer choice by comparing it to the information provided.
(A) Sentence three indicates that at least some mainshocks are preceded by foreshocks. However, nothing indicates that all mainshocks are preceded by foreshocks.
(B) Sentence four indicates that at least some mainshocks are followed by aftershocks. However, nothing indicates that all mainshocks are followed by aftershocks.
(C) The passage doesn’t provide any information about the frequency of aftershocks relative to foreshocks.
(D) Although the passage says that neither foreshocks nor aftershocks are as strong as mainshocks, it does not provide any information about the strength of foreshocks and aftershocks relative to each other.
(E) True. The passage states that the probability that an earthquake will trigger a bigger earthquake does not depend on the magnitude of the first earthquake; rather, the probability is related to the location of that first quake and its interaction with the fault system. Therefore there is at least some probability that one earthquake could trigger another. Since a foreshock, by definition, comes before a mainshock, it is possible that a foreshock could trigger a mainshock. This statement is true.
(F): False. The fourth sentence says that the mainshock is the quake of the greatest magnitude in a related series of quakes. The aftershock, then, cannot be bigger than the mainshock that preceded it. This statement is false.
Column 1: The correct answer is (E).
Column 2: The correct answer is (F).
Evaluate each answer choice by comparing it to the information provided.
(A) Sentence three indicates that at least some mainshocks are preceded by foreshocks. However, nothing indicates that all mainshocks are preceded by foreshocks.
(B) Sentence four indicates that at least some mainshocks are followed by aftershocks. However, nothing indicates that all mainshocks are followed by aftershocks.
(C) The passage doesn’t provide any information about the frequency of aftershocks relative to foreshocks.
(D) Although the passage says that neither foreshocks nor aftershocks are as strong as mainshocks, it does not provide any information about the strength of foreshocks and aftershocks relative to each other.
(E) True. The passage states that the probability that an earthquake will trigger a bigger earthquake does not depend on the magnitude of the first earthquake; rather, the probability is related to the location of that first quake and its interaction with the fault system. Therefore there is at least some probability that one earthquake could trigger another. Since a foreshock, by definition, comes before a mainshock, it is possible that a foreshock could trigger a mainshock. This statement is true.
(F): False. The fourth sentence says that the mainshock is the quake of the greatest magnitude in a related series of quakes. The aftershock, then, cannot be bigger than the mainshock that preceded it. This statement is false.
Column 1: The correct answer is (E).
Column 2: The correct answer is (F).
Re: Earthquakes occur when energy in the earths crust is suddenly release
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14 Apr 2024, 03:02
14 Apr 2024, 03:02
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Re: Earthquakes occur when energy in the earths crust is suddenly release [#permalink]
14 Apr 2024, 03:02
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