A seismic sensor is provided. The seismic sensor includes a housing, one or more detectors including a first detector tuned to vibrate when exposed to a first frequency, and the one or more microsensors associated with each of the one or more detectors. The one or more microsensors are configured to detect a vibration of the corresponding detector. The seismic sensor is configured to a) receive a signal at the first frequency, b) cause the first detector to vibrate in respond to the received signal at the first frequency, and c) transmit the received signal in response to detecting the first frequency.

A system is provided. The system includes a plurality of seismic sensors and a computer device. The computer device is programmed to a) store a plurality of distances between each of the plurality of seismic sensors; b) store one or more fingerprints of a signal to be detected; c) receive a first signal transmitted from a first seismic sensor of the plurality of seismic sensors; d) receive the first signal transmitted from a second seismic sensor of the plurality of seismic sensors; e) compare the first signal to the one or more fingerprints of the signal to be detected; and f) determine a direction of travel of the first signal based on the distance between the first seismic sensor and the second seismic sensor, the first time, and the second time.

A seismic sensor includes a measurement unit configured to measure acceleration; an earthquake determination unit configured to determine whether or not an earthquake has occurred based on the acceleration measured in a predetermined determination period; an index calculator configured to calculate an index value indicating a scale of an earthquake in an earthquake processing period after the predetermined determination period, when the earthquake determination unit determines that an earthquake has occurred; a continuous earthquake determination unit configured to determine whether or not an earthquake has occurred, based on the acceleration measured in the earthquake processing period; and a shut-off determination unit configured to inhibit output of the shut-off signal regardless of the index value when the continuous earthquake determination unit determines that no earthquake has occurred.

A seismic sensor may include a simple earthquake detection mode in which measured acceleration data is not saved, and which mode is continued in a case in which the measured acceleration is equal to or less than a predetermined first threshold value. An earthquake detection mode may further be included in which the measured acceleration data is saved, and which mode is continued in a case in which the acceleration measured in the simple earthquake detection mode is greater than the first threshold value and equal to or less than a second threshold value that is greater than the first threshold value. An earthquake measurement mode may further be included in which the acceleration data and a spectrum intensity (SI) value are measured and saved, and which mode is continued in a case in which the acceleration measured in the earthquake detection mode is greater than the second threshold value.

Systems and methods for detecting a mechanical disturbance are disclosed. One of the method may comprise the operation steps including: transmitting, by a transmitter, a pulse at a preset frequency along a first cable; receiving, by a receiver, a plurality of signals, wherein each of the plurality of signals travels along the first cable and a second cable connected to the receiver for a corresponding span; calculating one or more differential phases, wherein each differential phase is calculated based on respective phases and the corresponding spans of two of the plurality of signals; and determining a localization of the mechanical disturbance based on the one or more differential phases.

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.

This invention is about a detection device based on the piezoelectric property of geological minerals. The device has a vibration detector for compressing geological minerals to generate charges, so as to detect vibration and a physiotherapy jacket for carrying out quantitative physiotherapy on a human body by detecting the amount of charges. The system has the advantages of: being simple in structure, comprising the vibration detector and the physiotherapy jacket, using the piezoelectric property of geological minerals such as quartz and tourmaline, so as to realize detection of environmental vibration indoors, underground or in the field, and improving the safety factor of geological exploration operations.

A seismic monitoring system includes a plurality of seismic monitors and a processing device operatively coupled to the plurality of seismic monitors. The processing device receives recordings of waveforms of motion detected at the plurality of seismic detectors in a geographic area. The processing device applies the respective recordings to corresponding positions of the seismic detectors in a three-dimensional geological model that describes its elastic attributes and tests a plurality of moment tensors at a plurality of locations. Based on the testing, the processing device determines a globally convergent source location and moment tensor in the three-dimensional model based on the testing.

In an array-type underwater apparatus for monitoring deformation of a reservoir landslide, an anchor is buried at an underwater monitoring point in a landslide mass, and a floating shell is configured to float on a water surface. A GPS sensor is configured to transmit and receive a GPS signal to obtain a real-time position of the floating shell, a water temperature sensor is used to obtain a water temperature-time relationship, and a gravity wave gauge is used to obtain a wave height-time relationship. An upper end of a pull cord is securely connected to the floating shell via a displacement compensation mechanism, and a lower end of the pull cord is securely connected to the anchor. The displacement compensation mechanism compensates for a displacement after the floating shell floats with a wave. An encoder-type displacement meter measures a real-time distance between the encoder-type displacement meter and the anchor.

A low-cost Internet-of-Things (IoT) earthquake early warning (EEW) device can be deployed at homes, business facilities, and field locations to provide on-site warning and alert regional subscribers. The IoT device is integrated with a sensor, such as a geophone, for ground motion sensing, a single board computer, an analog-to-digital converter, an alert, wireless connectivity, and custom-designed packaging. A custom software application can control the device, detect earthquakes, and issue alerts. The device can run automatically and can be managed remotely. A collection of devices can form a network to provide even more lead time in EEW. For example, if one device detects an earthquake in northern Los Angeles metro area and alerts another device/user/subscriber of the warning service in southern Los Angeles, then the latter gets extra warning time because it could take about 5 to 10 seconds for seismic waves to travel from northern to southern Los Angeles.