This review covers basic theory and techniques behind the use of ground-based gravimetry
at the Earth's surface. The orientation is toward modern instrumentation, data processing …

Mostly accepted and widely reported radon (Rn 222) measurements, a tool for earthquake
precursor research, is a part of multi-parametric geophysical observation in the Garhwal …

In this paper, we present observations of free oscillations of the Earth after major
earthquakes in Chile (February 27, 2010, MW 8.8) and Japan (March 11, 2011, MW 9.1) …

We present a study on gravity data from the Observatory Superconducting Gravimeter (OSG-
051) located at MPGO Ghuttu in the Garhwal Himalaya, India. Ambient noise observed at …

The opening of cracks and influx of fluids in the dilatancy zone of impending earthquake is
expected to induce short-term changes in physical/chemical/hydrological properties during …

Radon has been measured continuously at an interval of 15min at 10m depth in a 68m deep
borehole. Five years of high resolution data of radon sampled at 15min shows a complex …

Pre-seismic gravity anomalies from records obtained at a 1 Hz sampling rate from
superconducting gravimeters (SG) around East Asia are analyzed. A comparison of gravity …

Microgravity surveying is a widely used geophysical method, especially for detection of
deeper features which are difficult to detect with other techniques. However, the accuracy of …

The study of earthquake precursor is being accomplished throughout the world based on
observations of ground and ionospheric parameters. The Multiparametric Geophysical …

Air pressure measurements conducted over 5 years at the Garhwal Himalaya (1836 m amsl)
in India show (expected) seasonal variations, along with marked diurnal and semi‐diurnal …