A retrofit valve shutoff device is provided that comprises a coupling key for coupling with an actuator of a shutoff valve on a fluid supply line, an inertial measurement unit for generating one or more signals in response to arrival of seismic waves, a motor for rotating the coupling key and the actuator of the shutoff valve, and a processing unit for receiving the one or more signals from the inertial measurement unit, analyzing the received signals to determine whether to close the shutoff valve, and sending a signal to the motor to rotate the coupling key and the actuator of the shutoff valve to close the shutoff valve based on the analysis of the received signals.

Gas migration rate(s) are determined using gas measurements from gas migration measurement devices. In response to the gas migration rate increasing, at least one of: air ionization measurements are collected from air ionization measurement device(s), and meteorological measurements collected from air temperature sensor(s), relative humidity sensor(s), and air pressure 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 least one transient outgoing long wave radiation (OLR) anomaly is looked for using atmospheric measurements. In response to observing the transient OLR, at least one ionospheric anomaly is looked for using ionosphere measurements. 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.

The proliferation of networked, wireless-enabled devices is challenged by the reliance upon password management and user knowledge of privacy and security techniques to maintain control over data that is personal, proprietary or restricted. This disclosure enables a geo-proximity security and privacy system for assuring control and non-repudiation for wireless-enabled devices by relying upon location and trusted network relationships among a set of wireless-enabled devices, where one or more devices may act as a control or master key. Security in a digital society may be benefitted by the establishment of digital walls that are as flexible as the world of cyberspace to be erected whenever and wherever wireless-enabled technology is in use. The security protocol may be configured to secure a protected device or the data they contain from loss, theft, abuse or misuse.

A system 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. The system utilizes utilities control units having a signal receiving device adapted to receive the alert and utilities control signals from the broadcasting systems, and a central processing unit module in communication with the signal receiving device and one or more utilities control mechanisms.

Systems and methods for determining a probability of an occurrence of a seismic event are provided. According to certain aspects, a system may receive one or more changes in acceleration associated with a plurality of vehicles. The system may receive one or more captured images of a vehicle occupant associated with a given vehicle of the plurality of vehicles. The system may determine a probability of an occurrence of a seismic event according to the one or more changes in acceleration exceeding a threshold and a likelihood that the one or more captured images are associated with an occurrence of a seismic event. Based on the probability exceeding a threshold, the system may provide an output signal that includes at least the determined probability and location information associated with the plurality of vehicles.

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.

Seismic device includes acceleration sensor that successively outputs an acceleration value according to magnitude of acceleration of applied vibrations, earthquake determining unit that differentiates and determines an earthquake and a shock from the acceleration value output from acceleration sensor, and seismic intensity calculator that calculates a seismic intensity equivalent value from the acceleration value output from acceleration sensor. Further, earthquake determining unit differentiates and determines an earthquake and a shock from a generation pattern of binary values binarizing the acceleration value output from acceleration sensor with the predetermined threshold value.

Novel solutions, which can include devices, systems, methods, than can measure earthquakes and other displacement events. Some solutions feature the integration of real-time, high-rate global navigation satellite system (GNSS) displacement information with acceleration and/or velocity data within a single device to create very high-rate displacement records. The mating of these two instruments allows the creation of a new, very high-rate displacement measurement device that has the full-scale displacement characteristics of GNSS and high-precision dynamic motions of seismic technologies. Such a device can be used for earthquake early warning studies and other mission critical applications, such as volcano monitoring, building, bridge and dam monitoring systems.

A portable lighting and warning device includes: a housing; a lighting generator unit; a sensor unit sensing shaking of the housing to generate a sense output; a mode selector unit generating a mode indication signal; a warning generator unit; and a controller unit. In a case where the mode indication signal indicates a lighting mode, the controller unit controls the lighting generator unit to emit light. In a case where the mode indication signal indicates a warning mode, the controller unit waits for a predetermined pause time, and then controls the warning generator unit and the lighting generator unit to output sound and emit light when the sense output corresponds to the shaking of the housing not less than a predetermined in intensity.

A computer-implemented method for seismic event localization includes: generating, with at least one processor, a vectorized snapshot matrix representing wave propagation data at a series of snapshots in time for a subterranean formation; computing a reduced orthonormal column basis matrix based on the vectorized snapshot matrix; constructing a reduced order wave propagation model based on the reduced orthonormal column basis matrix; receiving seismic data collected from a plurality of receivers at the subterranean formation; generating a time-domain coefficient matrix based on back propagation of the received seismic data and the reduced order wave propagation model; reconstructing time-reversed wavefield data based on the time-domain coefficient vector; and generating signals for outputting wavefield or seismic event location information based on the time-reversed wavefield data.