![LITERATURE REVIEW
Vertical (downhole) sensor arrays are deployed worldwide at seismically
active regions to record soil and overall site responses to earthquake
excitations.
In the United States, an early down-hole data set was recorded at Union Bay
in Seattle, Washington [1971].
The prospect for conducting 3-dimensional (3D) studies using downhole array
data is illustrated by the Chiba dense array [Katayama et al. 1990]. This array
is located at Chiba Experiment Station of the University of Tokyo, Japan.
Extensive data was recorded by the Chiba array (nearly 160 earthquake
events).
December 4,
2024
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- 1. Acquisition and processing of earthquake data Supervisor: Prof. Dr. IRSHAD AHMAD 1 NAJI ULLAH 21PWCIV5766 FAISAL MAHSOOD 21PWCIV5762 AMAN ULLAH 21PWCIV5761 FARHAD ADIL 21JZCIV0550 GROUP MEMBERS December 4, 2024
- 2. 2 TABLE OF CONTENT Introduction and scope Literature view Problem statement Objectives Methodology Gannt chart References December 4, 2024
- 3. INTRODUCTION AND SCOPE A vertical seismic array It is a series of sensors or seismometers arranged vertically in a borehole or along the height of a structure (such as a building, dam, or bridge) to measure and record seismic activity at different depths or elevations. This setup allows engineers to observe how seismic waves travel through the ground or how structures respond to seismic forces at various levels. Applications of vertical seismic array 1. Seismic Site Response 2. Real-Time Monitoring 3. Borehole Seismology 3 General arrangement of vertical seismic array December 4, 2024
- 4. 4 INSTALLATION OF Seismic vertical Array in CED : Prof. Dr. Irshad Ahmad installed Pakistan first seismic vertical array in Civil Engineering Department University of Engineering & Technology Peshawar in 2016. The array consist of one surface and two downhole sensors installed at 25m and 60m depth. Two GMSPLUS recorder are used for taking, storing and uploading of data while the GPS system provides UTC (Universal Time Clock) time frame. December 4, 2024
- 5. LITERATURE REVIEW Vertical (downhole) sensor arrays are deployed worldwide at seismically active regions to record soil and overall site responses to earthquake excitations. In the United States, an early down-hole data set was recorded at Union Bay in Seattle, Washington [1971]. The prospect for conducting 3-dimensional (3D) studies using downhole array data is illustrated by the Chiba dense array [Katayama et al. 1990]. This array is located at Chiba Experiment Station of the University of Tokyo, Japan. Extensive data was recorded by the Chiba array (nearly 160 earthquake events). December 4, 2024 5
- 6. PROBLEM STATEMENT Problem Statement Seismic activity poses a significant threat to infrastructure, particularly in seismic active zone. methods of acquiring and processing earthquake data are often limited and delayed hazard assessments. real-time acquisition and efficient processing of seismic data to improve earthquake hazard prediction and structural safety assessments. December 4, 2024 6
- 7. AIM AND OBJECTIVES Real-Time data Monitoring . We will install a screen somewhere . Where data from real time is displayed on screen . 7 December 4, 2024
- 8. METHODOLOGY( flow chart) Accelerometer sensor Data Recording (GMSPLUS) Device Configuration Data Visualization Real-Time Data Processing Remote Configuration Event Detection and Alerts Data Transmission (analog to digital data) December 4, 2024
- 9. METHODOLOGY 9 Step Description Tools/Software 1. Seismic Sensors Install seismic sensors (accelerometers, geophones) in seismic-prone areas to record ground motion. Seismic sensors (e.g., accelerometers ) 2. Data Recording Collect analog seismic data using the GMSPLUS Recorder and store them in memory card or remote access GMSPLUS Recorder 3. Device Configuration Connection between computer and GMSPLUS recorder for data transmission, logging and monitoring. UCON Software 4. Data Transmission (analog to digital data) Transmit seismic data to the processing center via serial port RS232 DB9 cable or wireless networks. RS232 DB9 cable /Wireless networks December 4, 2024
- 10. 10 METHODOLOGY Step Description Tools/Software 5. Remote Configuration Access the GMSPLUS recorder remotely for setup and monitoring. PuTTY (SSH/Telnet) 6. Real-Time Data Processing Analyze real-time seismic data to estimate frequency content acceleration, amplitude and site response spectrum, GeoDAS Software 7. Data Visualization Display seismic waveforms and event mapping in real-time. GeoDAS Software 8. Event Detection and Alerts Set up an alert system for seismic events, notifying relevant personnel through SMS or email. GeoDAS (for event detection), SMS/Email 9. Data Storage Store seismic data for post-event analysis and long-term research. GMSPLUS Storage, Cloud Storage (optional) December 4, 2024
- 11. 11 December 4, 2024 GANTT CHART 11 Task Name Oct Nov Dec Jan Feb Mar April May Literature review Device configuration Data transmission Remote configuration Real time data processing Data visualization Thesis Writing
- 12. December 4, 2024 12 REFRENCES Accelerometer V4.5,GeoSIG Ltd, Switzerland,2014. GMSPlus quick user Manual ,GEOSIG Ltd,Switzerland,2014. Thesis of installation of vertical seismic array.