The influence of the sun to the earth's gravity caused the sea tide phenomenon in the water around the northern coastal city of Surabaya. In a few days, the National Meteorological and Geophysics climatology Maritime Silver noted the increased height of the sea water of 150 centimeters above the surface of the sea. "When this position is in the earth between the sun and the moon. Because the earth is the one with the sun, the influence of gravity power sun caused a sea-water tide phenomenon, "said staff meteorologist and geophysics BMKG Maritime Silver Eko Prasetyo, Tuesday (26 / 6) in Surabaya. According to Eko, in the last three years, sea water tide always occurs in the northern coastal area of East Java. If in the normal condition, the average n ketinggia water reaches 110 to 120 centimeters from the surface of the sea, is now increasing water reached 150 centimeters from the surface of the sea.
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