Positive feedback, memory, and the predictability of earthquakes

Area of Science:

• Geophysics
• Seismology
• Complex Systems

Background:

• The
• critical point
• concept in seismology describes a state preceding large earthquakes.
• This concept can be extended using ,
• finite-time singularities ,
• theory to explain accelerated seismic release.

Purpose of the Study:

• To review and expand the
• critical point ,
• concept for large earthquakes.
• To investigate the role of positive feedback mechanisms in accelerated seismic release.
• To present and analyze key mechanisms driving seismic positive feedback.

Main Methods:

• Review of the
• critical point ,
• concept in seismology.
• Application of
• finite-time singularities ,
• framework to earthquake processes.
• Analytical solution of a simplified model demonstrating geometrical positive feedback.

Main Results:

• Accelerated seismic release near a critical point is explained by positive feedback.
• The seismic activity rate positively influences its own release rate.
• A model shows how tectonic stress fragments the stress shadow of previous earthquakes, enhancing feedback.

Conclusions:

• Finite-time singularities provide a framework for understanding accelerated seismic release.
• Positive feedback mechanisms are crucial drivers of seismic activity nearing critical points.
• The interplay between tectonic stress and seismic event interactions is key to earthquake dynamics.