Correlation Dimension and Seismic Quiescence around Northern Sumatra
Abstract The implementation of the correlation dimension (Dc) analysis is often used to measure the scaling attribute's possible size or grouping of seismotectonic variables. Related to seismicity in certain areas, Dc can suggest the existence of potential seismic gaps to release strain energy in the future. It can be identified that the presence of earthquake precursors can be characterized by changing the pattern of seismicity in space-time correlate strongly with the existence of zones and periods of seismic quiescence before major earthquake events. In this study, the Dc and the difference of Dc (δDc) are evaluated based on previous studies in which Dc is estimated based on the b-value of shallow earthquake data, and δDc is calculated based on the two periods before and during Region Time Length. We found the consistency that the areas filled by large earthquake events are in the zone with relatively high Dc and δDc. Dc tends to have a strong correlation to suggesting the existence of potential seismic gaps to release strain energy. δDc could be correlated with the possible stress transfer that may trigger the next sequence large earthquake.