Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A) Continuous time series data. (B) Spectrogram: amplitude on log scale. (C) Spectral images from two similar earthquakes at 1267 and 1629 s. (D) Haar wavelet coefficients: amplitude on log scale. (E) Sign of top standardized Haar coefficients after data compression. (F) Binary fingerprint: output of feature extraction. Notice that similar spectral images result in similar fingerprints.
