Natural Hazards

Every year in the United States, natural hazard events threaten lives and livelihoods, resulting in deaths and billions of dollars in damage. Access the scientific data collected from monitoring, assessing, and conducting targeted research on a wide range of natural hazards.

Filter Total Items: 54
Date published: March 6, 2019


OpenSHA is an effort to develop object-oriented, web- & GUI-enabled, open-source, and freely available code for conducting Seismic Hazard Analyses (SHA).

Date published: March 6, 2019

NSHMP Models, Codes and Catalogs - National Seismic Hazard Mapping Project

Models, Codes and Catalogs used to produce the National Seismic Hazard Maps.

Date published: March 6, 2019


The Product Distribution Layer (PDL) is a USGS platform for receiving earthquake data over the Internet in near-real time.

Date published: March 6, 2019

P-Phase Picker

PPHASEPICKER is a powerful tool for automatically picking P-phase onsets with high precision without requiring detection interval or threshold settings.

Date published: March 6, 2019

PQLX: A Software Tool to Evaluate Seismic Station Performance

PQLX is open-source software system for evaluating seismic station performance and data quality.

Date published: March 6, 2019

HASH 1.2

HASH is a Fortran 77 code that computes double-couple earthquake focal mechanisms from P-wave first motion polarity observations, and optionally S/P amplitude ratios.

Date published: March 6, 2019


HypoDD is a Fortran computer program package for relocating earthquakes with the double-difference (DD) algorithm of Waldhauser and Ellsworth (2000).

Date published: March 6, 2019

HYPOINVERSE Earthquake Location

HYPOINVERSE2000 determines earthquake locations and magnitudes from seismic network data like first-arrival P and S arrival times, amplitudes and coda durations.

Date published: March 6, 2019

Coulomb 3

Coulomb is designed to investigate Coulomb stress changes on mapped faults and earthquake nodal planes, and is intended both for publication-directed research and for university teaching and instruction.

Date published: March 6, 2019

ComCat Wrapper Libraries

Bulk access via scripts, programs, and tools for obtaining specific products from ComCat (the earthquake catalog).

Date published: March 6, 2019

Direct Green's Function Synthetic Seismograms

These programs are an implementation of the Direct Green’s Function method described by Friederich and Dalkolmo (1995) and Dalkolmo (1993).

Date published: March 6, 2019


est_noise is a time-series analysis program that allows the user to fit various, standard functions to their data (rates, offsets, rate-changes, sinusoidals, exponentials, and/or user-defined functions) and simultaneously quantifies the amount of temporal correlation in the time-series data.