Seismic technology is a detection system that uses seismic waves to detect subterranean conditions. As Silixia explains, the technology is useful for several applications, including oil and gas exploration, geologic engineering, and waste disposal. There are many different types of seismic equipment, and this article will help you discover them and their uses.
3 Common Types of Seismic Equipment and How to Use Them
- Strike-Slip Transmitter
These devices use gravity waves to detect the location of underground strata. This can be used to locate oil or gas deposits and geological engineering, geological mapping, and geomorphology.
How It Works
A large steel plate is dropped into a pit and drops slowly. The wave created by the drop travels through the earth and bounces off the subsurface reflections. An echo can be recorded and sent to a seismograph that records where to drill.
- Seismometer
A seismometer measures ground acceleration caused by earthquakes and other seismic events. These devices simultaneously record seismic waves (ground movement) and acceleration (gravity-related) data. An inexpensive version consists of a metal surface mounted in a box with a needle that moves up or down along this surface as an earthquake occurs. More sophisticated versions have electronic components that provide more accurate measurements in less time.
How It Works
A vibrating structure such as a thin wire placed in the earth, or a more sophisticated mechanical device, is attached to a seismometer to record the movement of the wire or other part of the structure. Seismic waves pass through this and are detected by a sensitive recording device.
- Geo-magnetometer
A geo-magnetometer measures electric field variations caused by the earth’s magnetic field. The location of underground strata is revealed when these variations change after completing mining activities. This can also be used to locate oil and gas deposits, hydrologic features, faults, and mineral exploration and exploration mapping.
How it Works
The probe is placed about 10 feet down into the ground near an underground recharge area that has been identified during drilling operations as being at least 500 feet from known construction or electrical lines. The probe must remain in place for several months, during which the construction is completed. If a surveyor should move the probe, it must be left in place until the survey is complete. From this point on, the probe will be operated strictly by remote control from the surface. If this option is selected, the geomagnetic signal can also be received over a telephone line or radio signal. This recording device records the electric field variation of the earth as it passes through the ground beneath its probe structure and converts this signal into a digital signal. Computers can later manipulate it to produce maps or images of depth and other information about subsurface formations at all levels within its range (500 meters to 20 kilometers).
The Impact of Seismic Technology on the Modern World
Great for Airports
Airports use seismometers to detect earthquakes so we can give advanced notice of any tremors that may happen in the future. Engineers also use seismometers at airports to predict whether an area has cracks or settling issues that could cause problems during takeoff and landing procedures. Cracks on runways are dangerous because they could result in serious damage to aircraft engines if not appropriately repaired immediately after an earthquake alert is sent out.
Helps Detect Oil and Gas Reservoirs
Seismic technology is applied to oil and gas exploration to determine the presence of oil and gas reservoirs through the use of multiple state-of-the-art seismic instruments. These waves spread out from an earthquake magnified by the earth’s crust that reflects off different layers of the earth. These reflector layers are known as seismometers. By detecting which areas have stronger reflections, we can conclude if oil or gas is present.
Seismic Technology Final Thoughts
Seismic technology helps us detect underground faults and other geological features situated near or within the earth’s crust. These features include earthquakes, landslides, and volcanic eruptions. This technology helps us better understand the geology of a particular area. This information can later be used to identify potential risks from earthquakes. It also helps in predicting earthquakes where they’re most likely to occur. It is also helpful in predicting volcanic eruptions and landslides so that we can take preventative measures before these natural disasters strike.
