本帖最後由 前兆 於 2016-5-10 20:53 編輯
Research Report on [LIGO scientists directly detect gravitational waves] event --- "gravitational waves" or "earthquake precursor wave" --- Author: Dajiong Lu Foreword
Since the laser interferometer not only be able to record seismic waves, but also can record to a variety of earthquake precursors (Reference book "Impending Earthquake Prediction" by Dajiong Lu). The paper about detecting gravitational wave published as the name of "LIGO Scientific Collaboration and Virgo Collaboration" only mentioned that they have been considered the exclusion of seismic waves, but at least did not see whether considering the exclusion of earthquake precursors or the other sources from Earth's interior which is not entirely impossible ......
Accordingly, we assume: whether the detected "gravitational waves" may be one kind of "earthquake precursor waves"? Following this idea, we have made some research!
A. Is the 「Gravitational wave」 detected by America』s LIGO the 「earthquake precursor wave 」 only ? If the 「gravitational wave」 detected by America』s LIGO on Sept. 14, 2015 at 09:50:45 UTC was one kind of 「earthquake precursor 」, it should occur before a large earthquake, again if the 「gravitational wave」 was one kind of 「impending earthquake precursor」, in that way it should occur at a few days, for example 2 or 3 days, before a large earthquake. At first, let』s inquire large earthquakes over M7 in the world which occurred within half a year before Oct. 26 , 2015 : 2. A magnitude 7.5 earthquake struck Papua New Guinea 130 km (81 mi) south southwest of Kokopo on May 5 at a depth of 55.0 km (34.2 mi). 4. A magnitude 7.8 earthquake struck offshore of Japan 189 km (117 mi) west northwest of Chichi-jima in the Ogasawara Islands on May 30 at a depth of 664.0 km (412.6 mi). 6. A magnitude 7.1 earthquake struck Vanuatu 34 km (21 mi) northeast of Port Olry on October 20 at a depth of 135.0 km (83.9 mi). Why so fortunately? This is occasional coincidence or correct thinking? A large earthquake of M8.3 occurred in Chile which is 7000~8000 km far away from LIGO gravitational wave detectors and just within 2~3 days after so-called gravitational wave arrived. The 「gravitational wave」 event just fell into impending quake period of the large earthquake in Chile, other large earthquakes in the world within same half a year were far away from LIGO gravitational wave detectors and were not within 2~3 days after that event. It means that unique Chile earthquake which was closest from LIGO gravitational wave detectors and the 「gravitational wave」 was detected within 2~3 days before Chile earthquake. So that it may be a good idea that the 「gravitational wave」 detected by America』s LIGO is one kind of earthquake precursor wave only! According to our past experiments of earthquake prediction, it is not strange that the detectors which is far away from the epicenter of M8 earthquake can receive the earthquake precursor wave (electromagnetic wave) from the emitter related with the M8 earthquake. On the other hand, it is very strange that the instruments with high sensitivity cannot receive any impending earthquake precursor wave from M8 earthquake! In conclusion, it is another possible option that the earthquake precursor wave just are the signals detected by America』s LIGO gravitational wave detectors. B. About the signal spectrum: If someone detected a certain wave motion, then he (or she) would have described the detected signal spectrum and the response curve of the detection equipment for the fluctuation frequency, thereby to determine whether the detected waveform has not been distorted ......
According to the introducing of the article "human directly detected the gravitational waves at first time」 " (Tencent space Qiao Hui at 23:43 on February 11, 2016) , an initial frequency of the detected gravitational waves signal is 35 Hz, then quickly raised to 250 Hz, and finally becomes disorderly and disappear ...... (the whole process lasted only a quarter of a second. The signal catched by detector in Livingston is 7 milliseconds earlier than the signal catched by detector in Hanford , the time difference indicates that gravitational waves was coming from the southern sky.) If we say that the detected signal is one kind of earthquake precursors wave , then let's take a look at the general earthquake precursor wave which Meets spectrum of the signal detected by LIGO detector or not
For the earthquakes over M6.5 to M7, if using the frequency counter to measure the frequency of earthquakes, their spectrum should be between 40Hz to 1575Hz. We can treat the earthquake precursor as the analog of initial motion of large earthquake (no shock after being triggered), its low-end frequency of the initial motion should be the same as the low-end frequencies of earthquake, but it should be less than the high-end frequency 1575Hz of earthquake, to be estimated as several hundred Hz . Thus the bands of earthquake precursor are in accordance with the bands of so-called "gravitational waves signal」. Secondly, assuming that the electromagnetic radiation precursor is caused by certain kind of piezoelectric effect, then the bands of electromagnetic radiation precursors should be consistent with bands of stress precursor.Therefore it cannot be excluded that the signal detected by LIGO detector is one kind of earthquake precursors waves as one kind of possibility.
C. About the duration of the signal: why is the duration of the precursor only 0.4 seconds? Namely why only 0.4 seconds if their signals are one kind of earthquake precursor ? In the past years, major study of the author was impending earthquake precursor, namely, the precursors occurred in few days before large earthquake. Before the earthquake, crustal stress is being modulated by solid tide, so the precursor would occur only while crustal stress reaches or exceeds the precursor threshold. In other word, impending earthquake precursor as sudden change form occur in the peaks or valleys of solid tide, generally speaking, they are short-lived. ( The earthquake would occur while crustal stress reaches or exceeds the threshold of earthquake.) Due to their gravitational wave detectors is shielded certainly very good, so only the strongest electromagnetic radiation emitted in the short duration (for example 0.4 second ) in which there are largest peak or valley value of tidal is able to penetrate the shield and to be detected. The electromagnetic radiation outside the duration ( 0.4 second ) is shielded by their instrument.
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