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An aftershock is in the same region of the main shock but always of a smaller magnitude.
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aftershock and is
An aftershock is an earthquake that occurs after a previous earthquake, the mainshock.
If an aftershock is larger than the main shock, the aftershock is redesignated as the main shock and the original main shock is redesignated as a foreshock.
An aftershock is a smaller, or in rare cases, a bigger earthquake that occurs after a previous large earthquake, in the same area of the main shock.
If an aftershock is larger than the main shock, the aftershock is redesignated as the main shock and the original main shock is redesignated as a foreshock.
Omori's law, or more correctly the modified Omori's law, is an empirical relation for the temporal decay of aftershock rates.
The rate of aftershocks is proportional to the inverse of time since the mainshock and this relationship can be used to estimate the probability of future aftershock occurrence.
Thus whatever the probability of an aftershock are on the first day, the second day will have 1 / 2 the probability of the first day and the tenth day will have approximately 1 / 10 the probability of the first day ( when p is equal to 1 ).
The other main law describing aftershocks is known as Båth's Law and this states that the difference in magnitude between a main shock and its largest aftershock is approximately constant, independent of the main shock magnitude, typically 1. 1-1. 2 on the Moment magnitude scale.
An aftershock sequence is deemed to have ended when the rate of seismicity drops back to a background level ; i. e., no further decay in the number of events with time can be detected.
This is because the magnitude of the earthquake was small, and the source area, which was estimated from the aftershock distribution and seismic waves, did not cover the whole expected source region.
Another quake occurs, which is initially thought to be an aftershock, but it is larger in magnitude than the original quake.
Nolan goes down to do it, but is pinned by the warhead when an aftershock hits.
aftershock and same
The same day at two o ' clock caused various aftershocks and on the next day, at seven in the afternoon caused a strong aftershock and damaged houses.
aftershock and region
In 2011 Imogen was set to play a benefit concert in New Zealand's Christchurch city to help rebuild the Unlimited Paenga Tawhiti High School, following a severe 6. 3 aftershock in February originating from the 7. 1 earthquake that struck the Canterbury region in September 2010.
aftershock and main
In 1894, Fusakichi Omori published his work on the aftershocks of earthquakes, in which he stated that aftershock frequency decreases by roughly the reciprocal of time after the main shock.
A magnitude 5. 6 strike-slip aftershock occurred three days later, two-and-a-half kilometers northwest of the main event ( and closer to Pasadena ) on October 4, causing additional damage and one additional death.
This main aftershock lasted several seconds and differed from the main event as the accelerations were smaller and were on the horizontal plane.
aftershock and magnitude
* 2007 – An earthquake of magnitude 6. 8 and 6. 6 aftershock occurs off the Niigata coast of Japan killing eight people, injuring at least 800 and damaging a nuclear power plant.
A large aftershock of magnitude 6. 3 occurred on at 12: 51 pm.
A 5. 7 magnitude aftershock caused several buildings to collapse on November 9, 2011.
These buildings were declared unsafe following the 1906 San Francisco earthquake and were being torn down when an aftershock of the magnitude that was predicted to destroy the buildings occurred and no damage was observed.
On a magnitude 6. 3 aftershock caused much more widespread damage in Lyttelton than its predecessor due to its proximity to Lyttelton and a shallow depth of.
On the night of 9 January there was a large aftershock with an estimated magnitude of about 6. 25, with a possible epicenter near the Garlock Fault.
The largest aftershock occurred on the afternoon of 16 January with an estimated magnitude of about 6. 7, with a possible offshore location, and high felt intensities in Southern California communities.
The last recorded major aftershock occurred on 16 April 1860, with an estimated magnitude of about 6. 3, with an epicenter close to the Parkfield section of the San Andreas Fault.
The strongest aftershock occurred on the morning of 5 March 1977, at 02: 00 AM, at a depth of, with a magnitude was 4. 9 on the Richter scale.
It was followed by a major 7. 1 magnitude aftershock some 16 hours later, increasing the death toll to over 255, 000.
A total of five sub-events occurred in the first eleven seconds and an aftershock measuring 5. 8 ( local magnitude ) occurred four minutes and twenty seconds later.
Following reports that the city has only prepared for earthquakes up to a magnitude of 6. 5, the aftershock renewed fears that the quakes might cause the Kego faultline to become active again beneath Fukuoka, leading to an earthquake as big as, or bigger than, the March 20 quake.
A 6. 5 magnitude earthquake during 1965 had even worse results, with the dome's brick buttresses left in such poor condition that a major aftershock could have caused them to collapse entirely, according to a state report.
By comparison, the 1986 North Palm Springs earthquake ( 5. 6 local magnitude ) had an aftershock area of.
aftershock and .
Uninjured in the initial shaking, the four-year-old Ansel Adams was tossed face-first into a garden wall during an aftershock three hours later, breaking his nose.
Three days later, on October 4, 1987, at 3: 59 a. m., a major aftershock measuring 5. 2 occurred, causing further damage.
In the case of the 2004 Indian Ocean earthquake and the 2008 Sichuan earthquake the aftershock distribution shows in both cases that the epicenter ( where the rupture initiated ) lies to one end of the final area of slip, implying strongly asymmetric rupture propagation.
is and same
Let me pass over the trip to Sante Fe with something of the same speed which made Mrs. Roebuck `` wonduh if the wahtahm speed limit '' ( 35 m.p.h. ) `` is still in ee-faket ''.
The content is not the same, however: rather than individual security, it is the security and continuing existence of an `` ideological group '' -- those in the `` free world '' -- that is basic.
The stink is all the same to me, but I really think they can make one another out blindfolded ''.
I knew that a conversation with the author would not settle such questions, because a man is not the same as his writing: in the last analysis, the questions had to be settled by the work itself.
At the same time, he is plainly sympathetic, clearly friendly.
How is the beat poet to achieve unity of form when he is at the same time engaged in a systematic derangement of senses.
Robert Penn Warren puts it this way in `` Brother To Dragons '': `` The recognition of complicity is the beginning of innocence '', where innocence, I think, means about the same thing as redemption.
One is that they were established, or gained eminence, under pressure provided by these same immigrants, from whom the old families wished to segregate their children.
At the same time, because the personal code of the detective coincides with the legal dictates of his society, because he likes to catch criminals, he is in middle class eyes a virtuous man.
The same command is repeated as many times as there are levels in rank from general to corporal.
And it is clearly argued by Lord Percy of Newcastle, in his remarkable long essay, The Heresy Of Democracy, and in a more general way by Voegelin, in his New Science Of Politics, that this same Rousseauan idea, descending through European democracy, is the source of Marx's theory of the dictatorship of the proletariat.
It is to say rather, I believe, that he has brought to bear on the history, the traditions, and the lore of his region a critical, skeptical mind -- the same mind which has made of him an inveterate experimenter in literary form and technique.
At the same time, I am aware that my recoil could be interpreted by readers of the tea leaves at the bottom of my psyche as an incestuous sign, since theirs is a science of paradox: if one hates, they say it is because one loves ; ;
This is a problem to be solved not by America alone, but also by every nation cherishing the same ideals and in position to provide help.
No matter how earnest is our quest for guaranteed peace, we must maintain a high degree of military effectiveness at the same time we are engaged in negotiating the issue of arms reduction.
It is not the same dress as the one on her manikin in the Smithsonian.
She had stood at the bottom of the stairs, as usual, when Mrs. Coolidge came down, in the same dress that is now in the Smithsonian, to greet her guests.
In this domain the simple fact of coexistence in the same local, national, and world community is enough to guarantee that we cannot refrain from having some effect, large or small, upon Gentile-Jewish relations.
The symposium provides an opportunity to confront the self with specific statements which were made at particular times by identifiable communicators who were addressing definite audiences -- and throughout several hundred pages everyone is talking about the same key symbol of identification.
It is true that this distinction between style and idea often approaches the arbitrary since in the end we must admit that style and content frequently influence or interpenetrate one another and sometimes appear as expressions of the same insight.
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