Seismic Station RA086 Statistical Analysis of Earthquake Data Using Shake Net and Grapher on the Global Seismic Activity: Analyzing Earthquake Patterns, Clustering, and Implications for Hazard Assessment
Mohammed Ali Garba1, Barka Jonathan2, Edwin Yenika Mbiimbe3, Kamureyina Ezekiel4, Mustafa Ali Garba5
1Mohammed Ali Garba, Department of Geology, Gombe State University, Gombe, Nigeria.
2Dr. Barka Jonathan, Department of Geology, Gombe State University, Gombe, Nigeria.
3Dr. Edwin Yenika Mbiimbe, Department of Geology, Gombe State University, Gombe, Nigeria.
4Dr. Kamureyina Ezikiel, Department of Geology, Adamawa State University, Mubi, Adamawa State, Nigeria.
5Mustafa Ali Garba, Department of Physics, University of Maiduguri. Nigeria.
Manuscript received on 21 October 2025 | First Revised Manuscript received on 30 October 2025 | Second Revised Manuscript received on 08 November 2025 | Manuscript Accepted on 15 November 2025 | Manuscript published on 30 November 2025 | PP: 23-31 | Volume-12 Issue-11, November 2025 | Retrieval Number: 100.1/ijies.K112812111125 | DOI: 10.35940/ijies.K1128.12111125
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open-access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The paper examines earthquake activity in 2023 using data from the active seismic station RA086 in the city of São Tomé. Five thousand and twenty-four (5,224) events of earthquakes were observed and processed with ShakeNet software and Grapher. On May 20, 2023, a strong earthquake of magnitude 7.6 was reported in the Pacific Ocean, off the coast of the Tanimbar Islands in Indonesia, at a depth of 105 km, and was followed by frequent earthquakes. The data reveal the distribution of earthquakes around the world, which is mainly concentrated in tectonic hotspots like the Pacific Ring of Fire, with magnitudes ranging from very large (7.6) to moderate. The earthquakes varied greatly in depth, ranging from shallow crustal earthquakes to deep-seated, long-focus earthquakes in the subduction zone, with depths over 500km. The analysis also shows frequent coalescence of mainshocks and aftershocks, particularly in subduction trenches, indicating continuous tectonic processes. Another aspect highlighted by the data is that both shallow and deep seismic events should be monitored, as energy released at different depths can affect surface shaking and the potential for disaster.
Keywords: Seismic Activity, Shakenet, Tectonic Zones (Mantle Transition Zone (MTZ, MW -Movement Magnitude).
Scope of the Article: Environmental Engineering