Seismometer Demonstration
Update 06-apr-2007

Seismometer Calibration
Update 06-apr-2007

A Longperiod Vertical Seismometer
Update 07-nov-2007

A Longperiod Horizontal Seismometer
Update 07-nov-2007

Normalized Frequency Response of a seismometer
Update 29-aug-2006

Free Motion of the moving mass of a seismometer
Update 29-aug-2006

Transferfunction and Systemresponse of some historical and actual seismometersystems
Update 15-dec-2006

Comparison of some historical and actual seismometersystems
Update 15- dec-2006

Seismometer-Galvanometer Coupling
Rev. 15-dec-2006

Huygens' Priciple
Update 29-jul-2006

Plane Waves in layered media
Update 10-sep-2006

Ray Paths
Rev. 27-jan-2003 ( + Download )

Magnetic 2-D Modelling
Update 03-aug-2005 : field observations and model data as Applet Parameters ( + Download )

Magnetic Dipole
Update 03-aug-2005 : field observations as Applet Parameters ( + Download )

A Magnetic Theodolit
Rev. 25-may-2006 ( + Download, HOWTO german only )

Schmidt Vertical Balance
Rev. 26-jul-2007 ( + Math.-phys. Background )

A Gravity Meter
Update 15-feb-2007 ( + Download )

Figure of the Earth
Rev. 04-nov-2001 ( uncommented )

Electric Sounding
Update 23-jan-2007 ( DEMO version with example data + PARM version = model parameters and field obsevations as Applet Parameters)

Geothermic 1-D Modelling
Update 31-may-2006 ( + Download )

Jonas' Dampfmaschine
Update 20-dec-2006

Justus' Dampflokomotive
Update 20-dec-2006

Clausthaler Kehrrad
Update 22-jan-2007

Wassersäulenmaschine
Update 20-dec-2006