Abstract: Gas migration rate(s) are determined using gas measurements from gas migration measurement devices. In response to the gas migration rate increasing, at least one of: air ionization measurements are collected from air ionization measurement device(s), and meteorological measurements collected from air temperature sensor(s), relative humidity sensor(s), and air pressure sensor(s). A latent heat energy release rate is determined using at least two of: the air ionization measurements, the meteorological measurements, and a numerical assimilation model. In response to the latent heat energy release rate increasing, at least one transient outgoing long wave radiation (OLR) anomaly is looked for using atmospheric measurements. In response to observing the transient OLR, at least one ionospheric anomaly is looked for using ionosphere measurements. In response to observing the at least one ionospheric anomaly, a forecast alert that an earthquake is likely to occur within one to four days is generated.

Abstract: Gas migration rate(s) are determined using gas measurements from gas migration measurement devices. In response to the gas migration rate increasing, at least one of: air ionization measurements are collected from air ionization measurement device(s), and meteorological measurements collected from air temperature sensor(s), relative humidity sensor(s), and air pressure sensor(s). A latent heat energy release rate is determined using at least two of: the air ionization measurements, the meteorological measurements, and a numerical assimilation model. In response to the latent heat energy release rate increasing, at least one transient outgoing long wave radiation (OLR) anomaly is looked for using atmospheric measurements. In response to observing the transient OLR, at least one ionospheric anomaly is looked for using ionosphere measurements. In response to observing the at least one ionospheric anomaly, a forecast alert that an earthquake is likely to occur within one to four days is generated.

Abstract: Gas migration rate(s) are determined using gas measurements from gas migration measurement devices. In response to the gas migration rate increasing at greater than a first rate: air ionization measurements are collected from: remote sensing air ionization measurement device(s), meteorological measurements collected from air temperature sensor(s) and relative humidity sensor(s). A latent heat energy release rate is determined using at least two of: the air ionization measurements; the meteorological measurements; and a numerical assimilation model. In response to the latent heat energy release rate increasing at greater than a second rate, transient OLR anomaly are looked for using atmospheric measurements. In response to observing the transient OLR, ionospheric anomal(ies) are looked for using ionosphere measurements collected over a fourth period of time.

Abstract: Gas migration rate(s) are determined using gas measurements from gas migration measurement devices. In response to the gas migration rate increasing at greater than a first rate: air ionization measurements are collected from: remote sensing air ionization measurement device(s), meteorological measurements collected from air temperature sensor(s) and relative humidity sensor(s). A latent heat energy release rate is determined using at least two of: the air ionization measurements; the meteorological measurements; and a numerical assimilation model. In response to the latent heat energy release rate increasing at greater than a second rate, transient OLR anomaly are looked for using atmospheric measurements. In response to observing the transient OLR, ionospheric anomal(ies) are looked for using ionosphere measurements collected over a fourth period of time.

Abstract: Forecasting the likelihood of an earthquake comprises: determining a gas migration rate using measurements collected from measurement device(s). The measurement devices may be measuring changes in radon gas intensity. If the gas migration rate increases at greater than a first rate, determining a latent heat energy release rate; if the latent heat energy release rate increases at greater than a second rate, look for at least one transient outgoing long wave radiation (OLR) anomaly using measurements collected from remote sensing atmospheric thermodynamic measurement(s); if the transient outgoing long wave radiation (OLR) anomaly has been observed, look for at least one ionospheric anomaly using measurements collected from ionosphere measurement device(s); and if the at least one ionospheric anomaly has been observed, forecasting that an earthquake is likely to occur within one to four days from the observation of the at least one ionospheric anomaly.

Abstract: Forecasting the likelihood of an earthquake comprises: determining a gas migration rate using measurements collected from measurement device(s). The measurement devices may be measuring changes in radon gas intensity. If the gas migration rate increases at greater than a first rate, determining a latent heat energy release rate; if the latent heat energy release rate increases at greater than a second rate, look for at least one transient outgoing long wave radiation (OLR) anomaly using measurements collected from remote sensing atmospheric thermodynamic measurement(s); if the transient outgoing long wave radiation (OLR) anomaly has been observed, look for at least one ionospheric anomaly using measurements collected from ionosphere measurement device(s); and if the at least one ionospheric anomaly has been observed, forecasting that an earthquake is likely to occur within one to four days from the observation of the at least one ionospheric anomaly.