Japanese researchers announced on the 16th that the successful use of the 16 billion-year strontium atomic lattice clock measuring only about 1 second has determined the elevation difference between two sites about 15 km apart. This technique can be used to monitor volcanic activity in the future. In February 2015, Professor Hidetoshi Hidehiro, a professor at the University of Tokyo, invented the strontium atomic lattice clock with a very high degree of accuracy, producing an error of 1 second for 16 billion years. This is the optical lattice clock of the highest accuracy in the world so far confirmed in experiments. According to General Relativity, the greater the gravity at the lower elevation of the earth, the slower the time will be. The Japan Science and Technology Agency and the Tokyo University Research Group set up a lattice clock in the laboratory of the University of Tokyo, setting up two optical lattice clocks at the Institute of Physical and Chemical Science approximately 15 km apart, The laser is sent to 3 optical lattice clocks to have the same initial vibration frequency. The team compared the number of atomic vibrations in three optical lattice clocks in three days and found that the two optical lattice clocks at the same Institute of Physical and Chemical Sciences at the same altitude had the same frequency of vibrations while the optical lattice clock at the University of Tokyo Laboratory was slightly slower . Based on the theory of relativity, the researchers calculated that the elevation difference between the two places was 15.16 meters. This result is almost the same as the difference in elevation measured by the Japanese National School of Geography. The researchers said that this high-precision measurement technology is expected to be used to monitor crustal changes such as volcanic activity and will greatly enhance the accuracy of earth mapping. Dongguan Huayuan Electronic Technology Co., Ltd , https://www.siliconefactory-oem.com