Simultaneous data acquisition of seismograph;

For modern seismographs, not only the used operation system software platform is stored and installed in hard disk, but also the acquired seismic data are directly stored in hard disc for some seismograph system.

The paper pointed out the basic technical requirement of high-density seismic acquisition for seismograph,summarized the property and technical feature of several current advanced seismographs as well as the situation using these seismographs for high-density exploration in China.

Absorption and attenuation of stratum and recording performance of seismic instrument.;

They are the key means for verificating and calibrating seismic apparatus and device periodically to ensure the accuracy of measurement data and guarantee the quality of seismic instrument product.