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Retrieving "Poroelastic Hysteresis" from the archives

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  1. Seismic Attenuation Anomalies

    Linked via "Poroelastic hysteresis"

    | Anomaly Type | Dominant $Q$ Behavior | Primary Associated Geophysical Feature | Dominant Attenuation Mechanism |
    | :--- | :--- | :--- | :--- |
    | High Attenuation Layer (HAL) | Frequency-independent ($Q \neq f$) | Near-surface fractured basalts; shallow water tables. | Poroelastic hysteresis |
    | Thermal Gradient Anomaly (TGA) | Weakly increasing with frequency ($Q \propto \ln(f)$) | Areas near metamorphic dehydration boundaries. | [Viscoelastic relaxation](/entri…