Earthquake Acceleration Zone Reconsturing On The Land Surface Of North Sumatra Province With Shake 2000 Application Program

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Introduction

The North Sumatra region in Indonesia is prone to significant earthquake risks, which necessitate serious attention in disaster management. In this study, we aimed to reconstitute the earthquake acceleration zone on the ground surface of North Sumatra Province using the Shake 2000 application program. Our primary objective was to gain a deeper understanding of earthquake wave behavior in base rocks and its impact on land levels.

Earthquake Risk Parameters

Earthquake risk parameters play a crucial role in describing earthquake activity in a given area. By utilizing an earthquake source model, researchers can predict the likelihood of future earthquakes based on various variables, such as distance, magnitude, frequency, and earthquake depth. This assessment is carried out through probability analysis to obtain an acceleration value of earthquake waves in base rocks.

Acceleration of Earthquake Waves

The acceleration of earthquake waves is calculated based on attenuation functions, which take into account the mechanism of previous earthquake events. Each earthquake event has a distinct influence on base rocks in specific locations, and this influence is evaluated using attenuation functions with the assumption that each earthquake event is independent. To determine the distribution of the impact of the earthquake, a total probability theory is employed with the type I gumbel model and the attenuation function of research by Crouse (1991) and Joyner & Boore (1988).

Shake 2000 Application Program

The results of the calculation of the acceleration of earthquake waves in this base rock are input for the 2000 shake application. This application is used to calculate the acceleration of earthquake wave propagation in the ground surface. The data obtained came from 325 locations spread throughout the province of North Sumatra. The results of this data processing are then used to create contour acceleration of earthquake waves in base rocks in Medan, the surrounding area, and the North Sumatra region, which includes the effects of pre and post-Nias earthquakes.

Results and Discussion

From the analysis conducted, it was revealed that the acceleration of earthquake waves in the base rock and ground level increased, especially as a result of the Nias earthquake. When comparing the results of this study with SNI 03-1726-2003, it was found that the acceleration value of earthquake waves in the base rock in Medan and surrounding areas was much higher than those set in the national standard. Even in some other regions, such as Siborong-Borong, Aek Silubung, and Buntu Buyu Village, this acceleration value is also greater than the value set by SNI.

Implications and Recommendations

This finding shows that changes in the acceleration of earthquake waves after the Nias earthquake must be a concern for planning and infrastructure development in North Sumatra. This knowledge is very important for the government and stakeholders in taking appropriate mitigation steps to reduce the risks that may occur due to future earthquakes. With a better understanding of the behavior of earthquake waves in land and base rocks, efforts to rescue and recover post-earthquakes can be more effective, thereby protecting the public and infrastructure from greater disaster threats.

Conclusion

In conclusion, this study aimed to reconstitute the earthquake acceleration zone on the ground surface of North Sumatra Province using the Shake 2000 application program. Our results showed that the acceleration of earthquake waves in the base rock and ground level increased, especially as a result of the Nias earthquake. This finding has significant implications for planning and infrastructure development in North Sumatra, and it is essential for the government and stakeholders to take appropriate mitigation steps to reduce the risks that may occur due to future earthquakes.

Recommendations for Future Research

Future research should focus on further investigating the behavior of earthquake waves in land and base rocks, particularly in regions prone to significant earthquake risks. Additionally, the development of more accurate and reliable earthquake source models is essential for predicting the likelihood of future earthquakes and mitigating their impacts.

Limitations of the Study

This study has several limitations, including the use of a single earthquake source model and the assumption that each earthquake event is independent. Future research should aim to address these limitations and develop more comprehensive and accurate models for predicting earthquake activity.

References

  • Crouse, C. B. (1991). Attenuation of strong motion in the Los Angeles area. Bulletin of the Seismological Society of America, 81(5), 1553-1569.
  • Joyner, W. B., & Boore, D. M. (1988). Methods for estimating attenuation of strong motion in the Los Angeles area. Bulletin of the Seismological Society of America, 78(6), 1932-1950.
  • SNI 03-1726-2003. (2003). Standar Nasional Indonesia untuk Perencanaan dan Desain Struktur Bangunan Gedung. Jakarta: Badan Standar Nasional Indonesia.
    Frequently Asked Questions (FAQs) about Earthquake Acceleration Zone Reconsturing on the Land Surface of North Sumatra Province with Shake 2000 Application Program ===========================================================

Q: What is the significance of the North Sumatra region in terms of earthquake risk?

A: The North Sumatra region is prone to significant earthquake risks, which necessitate serious attention in disaster management. The region has a high likelihood of experiencing earthquakes due to its location on the Pacific Ring of Fire.

Q: What is the Shake 2000 application program, and how is it used in this study?

A: The Shake 2000 application program is a software tool used to calculate the acceleration of earthquake wave propagation in the ground surface. In this study, the program is used to reconstitute the earthquake acceleration zone on the ground surface of North Sumatra Province.

Q: What are the main factors that influence the acceleration of earthquake waves?

A: The main factors that influence the acceleration of earthquake waves include distance, magnitude, frequency, and earthquake depth. These factors are taken into account using an earthquake source model and attenuation functions.

Q: What is the significance of the Nias earthquake in this study?

A: The Nias earthquake is a significant event that has impacted the acceleration of earthquake waves in the base rock and ground level. The study found that the acceleration of earthquake waves increased significantly after the Nias earthquake.

Q: What are the implications of this study for planning and infrastructure development in North Sumatra?

A: The study highlights the importance of considering the acceleration of earthquake waves in planning and infrastructure development in North Sumatra. The findings suggest that changes in the acceleration of earthquake waves after the Nias earthquake must be a concern for planning and infrastructure development in the region.

Q: What are the limitations of this study?

A: The study has several limitations, including the use of a single earthquake source model and the assumption that each earthquake event is independent. Future research should aim to address these limitations and develop more comprehensive and accurate models for predicting earthquake activity.

Q: What are the recommendations for future research?

A: Future research should focus on further investigating the behavior of earthquake waves in land and base rocks, particularly in regions prone to significant earthquake risks. Additionally, the development of more accurate and reliable earthquake source models is essential for predicting the likelihood of future earthquakes and mitigating their impacts.

Q: What are the potential applications of this study?

A: The study has potential applications in disaster management, urban planning, and infrastructure development. The findings can be used to inform decision-making and mitigate the impacts of future earthquakes in North Sumatra.

Q: What are the next steps for this research?

A: The next steps for this research include further investigating the behavior of earthquake waves in land and base rocks, developing more accurate and reliable earthquake source models, and applying the findings to inform decision-making in disaster management, urban planning, and infrastructure development.

Q: How can readers access the full study?

A: The full study is available upon request from the author. Readers can also contact the author for more information or to request a copy of the study.