Abstract: There is provided a portable electronic device capable of being immediately operated without the use of a battery even when the battery reaches exhaustion. An electricity generating unit 131 is embedded in the portable electronic device. The electricity generating unit 131 has a mechanism to pull out a pull line 113 wound around a pulley 135 to wind up a spiral spring 133 and a mechanism to transfer torque occurring when the spiral spring 133 is released and to rotate the motor at high speed. An output voltage from the motor 142 is adjusted and smoothed by a constant voltage circuit and is directly supplied as power to power consuming components. The portable electronic device connecting two flips can wind up the spiral spring 133 by opening and closing the two flips.

Abstract: There is provided a portable electronic device capable of being immediately operated without the use of a battery even when the battery reaches exhaustion. An electricity generating unit 131 is embedded in the portable electronic device. The electricity generating unit 131 has a mechanism to pull out a pull line 113 wound around a pulley 135 to wind up a spiral spring 133 and a mechanism to transfer torque occurring when the spiral spring 133 is released and to rotate the motor at high speed. An output voltage from the motor 142 is adjusted and smoothed by a constant voltage circuit and is directly supplied as power to power consuming components. The portable electronic device connecting two flips can wind up the spiral spring 133 by opening and closing the two flips.

Abstract: A detection of an anomaly of geomagnetism and a collection of data are performed by using portable telephones. Direction variations measured by geomagnetic sensors mounted to the portable telephones are collected via data transmission lines for portable telephones, and the variations are observed for each area. Earthquake occurrence warning information is transmitted to a portable terminal of a collaborator for geomagnetism information provision in an area in which a number of occurrences of the variations is significantly large.

Abstract: Vehicles or ships each carry a magnetic force line sensor, a GPS position detector, and a data transmitter and travel within an observation area transmitting magnetic field data and position data to an earthquake prediction center. A telluric current induction field estimation unit of the earthquake prediction center estimates telluric current induction fields based on the received observation data. A telluric current estimation unit estimates telluric currents based on the results of estimating the telluric current induction fields. A telluric current induction field intensity change pattern generation unit generates patterns indicating the change over time of the intensity of telluric current induction fields. An earthquake prediction unit analyzes the state of distribution of the telluric currents and the patterns of change in the intensities of the telluric current induction fields and estimates a seismofocal zone, seismic intensity, and time of occurrence of a seismic event.

Abstract: Vehicles (1-1) or ships (1-2) each carry a magnetic force line sensor (11), a GPS position detector (12), and a data transmitter (13) and travel within an observation area transmitting magnetic field data and position data of each point to an earthquake prediction center (4). A telluric current induction field estimation unit (43) of the earthquake prediction center (4) estimates telluric current induction fields based on the observation data that it receives and collects. A telluric current estimation unit (44) estimates telluric currents based on the results of estimating the telluric current induction fields. A telluric current induction field intensity change pattern generation unit (45) generates patterns that indicate the change over time of the intensity of telluric current induction fields.