English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Electric signals have been recently recorded at the Earth's surface withamplitudes appreciably larger than those hitherto reported. Their entropy innatural time is smaller than that, $S_u$, of a ``uniform'' distribution. Thesame holds for their entropy upon time-reversal. This behavior, as supported bynumerical simulations in fBm time series and in an on-off intermittency model,stems from infinitely ranged long range temporal correlations and hence thesesignals are probably Seismic Electric Signals (critical dynamics). The entropyfluctuations are found to increase upon approaching bursting, which reminds thebehavior identifying sudden cardiac death individuals when analysing theirelectrocardiograms.Comment: 7 pages, 4 figures, copy of the revised version submitted to Physical  Review Letters on June 29,200

Entropy of seismic electric signals: Analysis in natural time under time reversal