Provided is an earthquake response system using a seismic motion sensor. The seismic motion sensor of the earthquake response system includes: a sensor unit measuring a sensor value including peak ground acceleration (PGA) of the ground due to shaking; a seismic motion sensing unit sensing seismic motion on the basis of a seismic motion sensing result value calculated from an artificial neural network that uses the peak ground acceleration as input when the peak ground acceleration satisfies a seismic motion sensing condition; a seismic motion determiner determining generation of final seismic motion on the basis of a seismic motion determination parameter calculated from the sensor value on the basis of the seismic motion sensing result; a shaking grade calculator calculating a shaking grade of the determined final seismic motion through the peak ground acceleration; and a communication unit notifying the shaking grade of the final seismic motion.

Gas migration rate(s) are determined using gas measurements from gas migration measurement devices. In response to the gas migration rate increasing at greater than a first rate: air ionization measurements are collected from: remote sensing air ionization measurement device(s), meteorological measurements collected from air temperature sensor(s) and relative humidity sensor(s). A latent heat energy release rate is determined using at least two of: the air ionization measurements; the meteorological measurements; and a numerical assimilation model. In response to the latent heat energy release rate increasing at greater than a second rate, transient OLR anomaly are looked for using atmospheric measurements. In response to observing the transient OLR, ionospheric anomal(ies) are looked for using ionosphere measurements collected over a fourth period of time. In response to observing the at least one ionospheric anomaly, a forecast alert that an earthquake is likely to occur within one to four days is generated.

A seismic switch (SS) that is able to detect and signal when internal faults have occurred within the SS is described. The SS provides safety class functionality to the detection of seismic activity. For example, the SS may detect earthquakes above a specified level, resulting in the disconnection of electrical power to a radioactive waste storage facility, which could result in the ignition of waste materials should the storage facility and/or storage container fail during a seismic event. By reducing the risk of fire under these circumstances, the possibility of offsite releases is significantly reduced.

The present disclosure relates to a device for laying out a prefabricated magnetic field and a method for responding state of a slip mass in the prefabricated magnetic field. The device may include a traction mechanism, a control mechanism and a layout probe. The layout probe may include a shell, a circuit board and at least one set of layout mechanism equipped in the shell. The layout mechanism may include a cartridge, a screw pole, an electromagnet, a driving mechanism and a pressing mechanism. The traction mechanism may lay down the layout probe to a default location of a drill hole. The control mechanism may control the driving mechanism to transmit an uppermost permanent-magnet in the layout probe to the cartridge nozzle and be attracted by the electromagnet. The pressing mechanism may move the electromagnet which presses the permanent-magnet in the inner wall of the drill hole.

The invention discloses an omnidirectional vector seismic data processing method and apparatus, a computer readable storage medium and a device, applied to an omnidirectional vector geophone. Wherein the method comprises: collecting omnidirectional vector seismic data of the omnidirectional vector geophone, and performing a pre-processing operation on the omnidirectional vector seismic data; performing pressure and shear waves separation operation on the omnidirectional vector seismic data after the data is subject to the pre-processing operation, to obtain pressure wave data and shear wave data; sequentially performing space vector calculation, a wave field recovery operation and an imaging operation on the pressure wave data and the shear wave data, and then performing modeling to obtain a pressure wave velocity model and a shear wave velocity model. The invention solves the problem of the existing seismic exploration technology that cannot measure and process divergence data and curl data of seismic wave field, so as to improve construction, lithology, fluid exploration accuracy and reliability and promote seismic exploration to be developed from structural exploration to lithology exploration and fluid exploration.

A system and method adapted to provide alert signals to individuals or institutions and/or control signals to utilities control units to automatically stop the flow of gas, water, electricity, oil, etc., such signals being delivered in response to the detection of seismic events, the detection occurring via ground-based monitoring systems and/or satellite-based monitoring systems. The alert and/or control signals are distributed through various broadcasting systems or similar channels of communication, such as radio frequency transmitters, Internet service providers, cell phone wireless carriers, satellite phone service providers and/or security monitoring service providers, to individuals and/or facilities through smartphones, landline telephones, tablets, PC's, voice-controlled web communication devices or the like and/or to signal receivers on utilities control units.

Parallel dipole line (PDL) trap seismometer and vibration sensors are provided. In one aspect of the invention, a seismometer is provided. The seismometer includes: at least one PDL trap having a pair of dipole line magnets, and a diamagnetic object levitating above the dipole line magnets; and a sensing system (passive or active sensing) for determining a position of the diamagnetic object relative to the dipole line magnets and to yield the seismic signal in terms of displacement or acceleration. Methods for sensing vibrations using the present PDL trap seismometer and vibration sensors are also provided.

A seismic wave shield for protecting an area from seismic vibrations and a method of shielding an area from seismic waves by installing a seismic wave shield. The seismic wave shield comprises a set of columns embedded in regolith and in contact with bedrock. There is a material contrast between a material forming the columns and the regolith.

A method for monitoring depth of a cave front in a cave-type mine. The method includes: providing a stationary reader device and mobile marker devices, each of the marker devices adapted to (i) emit an electromagnetic signal, (ii) detect strength of the signal emitted by another of the marker devices, and (iii) wirelessly transmit information related to the detected signal via the other marker devices to the stationary reader device; drilling a hole into a rock region of a mine, installing the mobile marker devices at sequential known depths within the hole; monitoring the reader device to detect a decrease in the strength of a signal emitted by a first marker device by a second marker device; and in response to a decrease being detected by the second marker device, inferring the depth of the cave front to be between the known depths of the first and second marker devices.

Erroneous determination of noise as an earthquake is reduced in a seismic sensor. The seismic sensor operates in a power saving mode and a measurement mode in which power consumption is larger than that in the power saving mode. The seismic sensor includes: a measurement unit configured to measure acceleration; an earthquake determinator configured to transition from the power saving mode to the measurement mode when the acceleration measured by the measurement unit exceeds a predetermined threshold, to determine whether an earthquake is generated based on the acceleration measured in the measurement mode; and an index calculator configured to calculate an index value indicating a scale of the earthquake when the earthquake determinator determines that the earthquake is generated. The earthquake determinator determines whether the earthquake is generated by determining whether a predetermined condition is satisfied, the predetermined condition being determined based on the acceleration measured in at least one determination period, each determination period into which a period after the power saving mode transitions to the measurement mode is divided being set to a processing unit, and the measurement mode transitions to the power saving mode when the earthquake determinator determines that the earthquake is not generated.