Abstract. Past studies that attempted to quantify the spatio-temporal organization of seismicity have defined conditions by which an event and those follow it can be related in space and/or time. In this work, we use simplest measures separation: interevent distances R times T between pairs successive events. We observe after a characteristic value R*, distributions begin randomly shuffled sequence, suggesting events separated > R* are more likely uncorrelated generated independent one...

Abstract We revisit the sandpile model and examine effect of introducing site-dependent thresholds that increase over time based on generated avalanche size. This is inspired by simplest means stability into a self-organized system: locations collapse are repaired reinforced. Statistically, for case finite driving times, we observe reinforcements decrease occurrence very large avalanches, leading to an effective global stabilization. Interestingly, however, long simulation runs indicate...

We examine avalanche statistics of rain‐ and vibration‐driven granular slides in miniature sand mounds. A crossover from power‐law to non avalanche‐size is demonstrated as a generic driving rate ν increased. For slowly‐driven mounds, the tail distribution with exponent −1.97 ± 0.31, reasonably close value previously reported for landslide volumes. The interevent occurrence times are also analyzed mounds; its exhibits −2.670 0.001.

Abstract. We propose a cellular automata model for earthquake occurrences patterned after the sandpile of self-organized criticality (SOC). By incorporating single parameter describing probability to target most susceptible site, successfully reproduces statistical signatures seismicity. The energy distributions closely follow power-law density functions (PDFs) with scaling exponent around −1. 6, consistent expectations Gutenberg–Richter (GR) law, wide range targeted triggering values....

The aftershock records of the magnitude 7.1 earthquake that hit island Bohol in central Philippines on 15 October 2013 is investigated light previous results for using historical earthquakes. Statistics interevent distances and times between successive aftershocks recorded whole month show marked differences from those earthquakes two Philippine catalogues varying periods completeness levels. In particular, distributions closely follow only regimes were previously attributed to strong...

Complex adaptive agents develop strategies in the presence of competition. In modern human societies, there is an inherent sense locality when describing inter-agent dynamics because its network structure. One then wonders whether traditional advertising schemes that are globally publicized and target random individuals as effective attracting a larger portion population those take advantage local neighborhoods, such "word-of-mouth" marketing schemes. Here, we demonstrate using differential...

We present a statistical characterization of the morphological features emerging from complex processes governing growth road network, particularly in mostly self-organized urban setting. Apart usual fractal analysis, roads are quantified by their lengths and straightnesses, while segmented blocks characterized areas, perimeters circularities. When applied to Metro Manila conurbation, one megacities Asia with fastest growing populations, we observe dense space-filling nontrivial...

We report the existence of enhanced heap stability as a result mixing granular materials. Our setup consists rectangular container, filled with binary mixture matter up to some height h, that is rapidly opened at one wall allow repose angle (θc) formation. develop an empirical model for θc based on Mohr–Coulomb failure criterion. The parameterized by effective cohesion c and coefficient friction μ depend on: (1) proportions (2) pure cases. Good agreement achieved between experiment model....

Abstract Road networks are some of the oldest and most permanent man-made structures in space, serving as valuable records conditions society through long periods time. Quantitatively analyzing these will therefore reveal rich insights into socio-political history, can provide awareness for effectively managing growth evolution future. Here, we extracted state road network Manila, Philippines at various points history georeferencing digitization hand-drawn historical maps. Visual metrical...

We compare the statistical distributions of geometrical properties road networks for two representative datasets under different levels planning: cities comprising Metropolitan Manila show conditions bottom-up self-organized growth, while Brasilia and Australian Capital Territory centered at Canberra represent case strict top-down planning. The distribution segmented areas shows a dual power-law behavior, with larger following ∼1.9 scaling exponent observed in other cities, smaller lower...

We studied the distribution of annual PM2.5 concentrations countries and territories as reported by World Health Organization (WHO) for last decade using self-reported data from governments other contributing institutions. The distributions follow various regimes corresponding to low, intermediate, high concentrations. intermediate regime is fitted with a power-law scaling exponent close 2.44 explained complexity perspective truncated exponential growth model random truncation rates....

Humans are deemed ineffective in generating a seemingly random number sequence primarily because of inherent biases and fatigue. Here, we establish statistically that human-generated the presence visual cues considerably reduce one's tendency to be fixated certain group numbers allowing distribution uniform. We also show stitching procedure utilizing auditory significantly minimizes human's intrinsic towards doublet sequential ordering numbers. The article provides extensive experimentation...

Spatiotemporal clustering of earthquake events is a generally-established fact, and important for designing models assessment techniques in seismicity. Here, we investigate how this behavior can manifest the statistical distributions inter-event distances times between earthquakes from different regional catalogs. We complement analysis previous authors (Touati et al., PRL 102, 168501 (2009)) observe histograms best described by superposition two component "short" "long" times. Our results...

The sandpile is one of the earliest discrete models to have demonstrated self-organisation believed be at work in earthquakes and other nonlinear systems nature. However, sandpile-based approaches are less utilised for modelling seismicity, due cascading behaviour avalanches, which, contrast bursty correlated earthquake dynamics, release all accumulated energy a single event. Here, model modified by introducing preferential targeting most susceptible grid site, allowing it generate simulated...