Jiggle is a graphical earthquake analysis tool

Its basic functions are:

Jiggle has been used since 2001 to process SCSN data. It still has bugs and missing features. Currently, available implementation interacts with the CISN schema used in Southern California. To access other databases would require creation of a concrete implementation of the "jasi" class library, which has been done for the Northern California Seismic Network, who are integrating Jiggle as an analysis tool presently.

Because it is written in Java, Jiggle is platform independent. It has been run on Solaris, Window NT v4.0, Windows 98, Windows2000, WindowsXP and FreeBSD.

The image above is a portion of the "Picking Window" and the tab functions. Once picks have been made on the available waveforms, a location and magnitude are then calculated by clicking on the respective buttons.

Jiggle was developed from the ground up by a USGS Pasadena Field Office Geophysicist, Doug Given. Additions and improvements were later programmed by another USGS scientist, Alan Walter.

Since human seismic analysis is generally better than automated real-time phase picks, SCSN Seismic Analysts use Jiggle for analysis on every available event, which increases the quality of the data immeasurably. Three full-time analysts, with assistance from the supervisor can complete the catalog weekly, provided the seismicity is at a normal level. During large sequences, part-time seismic analysts may be employed to assist in the analysis.

Note: Jiggle is intended for the analysis of seismic data from a data base at processing centers. It is not a tool for the casual or research user.

Recently, an OpenMap feature has been added, which displays stations, events, faults, and many other important layers.