ROMSO Cyprus Knowledge Base
"The tsunami"
- CONTENT -
CHOENAMI (JAPANESE 津波) IS A PHENOMENON OF LARGE SEA WAVES THAT EMIT GREAT POWER INTO SEA BEACHES. TSUNAMIS USUALLY OCCUR DUE TO VOLCANIC ERUPTIONS AND EARTHQUAKES, AND IN RARE CASES EVEN DUE TO SUB-MEMIC EXPLOSIONS, ICE BEDS AND COLLISION EVENTS. COMPARED TO WATER WAVES, CREATED BY THE GRAVITY OF THE MOON AND THE SUN, TSUNAMIS ARE FORMED BECAUSE OF A LARGE OBJECT THAT REPLACES OR DESTROYS THE WATER.
POSSIBLE CAUSES OF TSUNAMI WAVES
TSUNAMI WAVES ARE MAINLY FORMED AFTER AN EARTHQUAKE IN THE DEPTHS OF THE OCEAN. THE END OF THE TOP CYCLIST HAS BEEN “DISPOSED” FOR A LONG TIME DOWN, DUE TO PRESSURE CAUSED BY THE BOARD’S SECTION AGAINST IT. WHEN THE END OF THE TOP PANEL, THE PUSH LIKE A SPRING, IS RELEASED AT ONCE AND MOVING FROM THE BOTTOM UP, IT IS DECORATED WITH THE SEAWATER AT A TREMENDOUS SPEED; THIS ACTION CAUSES A GREAT ENERGY RELEASE, WHICH SHOOK THE WATER AND CREATES VERY STRONG SEISMIC WAVES FROM THE CENTER OUT, MOVING QUICKLY BETWEEN 400 AND 1,000 KM. SOMETIMES, THE SYSTHESIZED TREMORS THAT MAKE THESE SAGES COME IN THE PITS, SO POWERFUL TSUNAMI WAVES CAN COME AFTER EACH OTHER, IN THE INTERPRET OF THIS MINUTE.
ANOTHER FACTOR, LESS COMMON, WHICH MAY CAUSE TSUNAMI WAVES, IS SUB-SEMITIC. IN SUCH A CASE, THE MOUNTAIN OR UNDERWATER RIDGE COLLAPSES IN THE DEPTHS OF THE OCEAN AND CAUSES THE BOILING OF THE WATER WITH GREAT POWER.
THE CHARACTERISTICS OF WAVES
IN THE TWO CASES DESCRIBED ABOVE, THE WAVES ARE ABLE TO PASS THOUSANDS OF MILES FROM THE PLACE WITHOUT LOSING ALMOST THEIR POWER. THE CLOSER THE WAVES REACH THE SHORE, THE DEPTH OF THE OCEAN IS RAPIDLY DECREASING, RESULTING IN THE HEIGHT OF THE WAVE – WHICH DOES NOT LOOK AT THE CORE OF THE OCEAN FROM BEING UNDER THE SURFACE OF THE WATER – GROWS INTO FLOATING DIMENSIONS. WHEN THE WAVE REACHES THE SHALLOW CONTINENTAL SHELF, A HUGE SURGE THAT IS BEING SHATTERED INTO THE COAST; THE WAVE OF WATER IS “BAD,” BEHIND IT AND ON TOP OF THE SEA’S SURFACE IS RISING, SO THE TSUNAMI PENETRATES LAND, AS THE SEA LEVEL RISES. THIS GIANT WAVE STRIKES ON THE COAST WITH GREAT INTENSITY, AND ALTHOUGH ITS SPEED CAN BE RELATIVELY SMALL (A FEW DOZEN KILOMETERS ONLY) IT WILL DESTROY ALL THAT STANDS IN ITS WAY IN THE RANGE OF HUNDREDS OF METERS FROM THE COASTLINE, DEPENDING ON THE NIGHTS OF THE COAST.
THE LENGTH OF A TYPICAL TSUNAMI WAVE, FROM THE PLACE OF THE SEISMIC OCCURRENCE, IS HUNDREDS OF KILOMETERS, DEPENDING ON THE NATURE OF THE DISORDER THAT CREATES IT. DUE TO THE DEPTH OF THE OCEAN IN WHICH IT WAS CREATED, IT COULD REACH A MAGNITUDE OF ONE METER, SO IN THE HEART OF THE SEA IT WAS ALMOST UNEXPRESSED; THERE WERE CASES IN WHICH A STRONG TSUNAMI MOVED UNDER THE BOATS OF JAPANESE FISHERMEN WHO ROAMED IN THE HEART OF THE SEA, WHO WERE ASTOUNDED TO DISCOVER – AS THEY RETURNED TO THEIR HOUSE AT THE END OF FISHERIES – WHOSE VILLAGE WAS COMPLETELY WIPED OUT OF THE EARTH. THE MAGNITUDE OF THE TSUNAMI WAVES AND THEIR SPEED CAN BE DIFFERENT FROM PLACE TO PLACE, ACCORDING TO VARIOUS PARAMETERS, SUCH AS THE SHAPE AND MEASUREMENT OF COASTAL NIGHTS. SOMETIMES, ON THE BACK OF THE ISLAND THERE IS A RIB EFFECT THAT INCREASES THE HEIGHT AND STRENGTH OF THE WAVES. IN GENERAL, IT IS POSSIBLE TO SAY THAT IF THE RATIO BETWEEN THE DEPTH OF THE SEABED WHERE THE WAVE WAS CREATED AND SOME POINT ON THE BEACH IS, THEN ITS SPEED AT THE SAME POINT WILL BE SMALLER THAN ITS INITIAL SPEED AND ITS HEIGHT FROM ITS INITIAL HEIGHT.
TRAINING AND RESEARCH
A PRECURSOR TO THE ARRIVAL OF A TSUNAMI – WHICH CAN GIVE THE STAY OF DOZENS OF SECONDS – IS A RAPID WITHDRAWAL OF WATER FROM THE COAST AND THE EXPOSURE OF THE SEABED, SINCE THE APPROACHING WAVE IS BUILT UPWARD FROM THE WATER IT DRAWS. SOMETIMES, THIS EFFECT IS SO STRONG THAT WHOLE GRAINS ARE EMPTIED AT ONCE OF ALL THEIR DAYS SO THAT THE BOATS FALL ON THE MUDLAND. THIS HAPPENED AT THE TIME OF THE GREAT TSUNAMI WASHED THE COAST OF THE INDIAN BASIN IN 2004, DURING WHICH SMITH, A 10-YEAR-OLD ENGLISH GIRL WHO HAD LEARNED ABOUT TSUNAMI WAVES IN THE SCHOOL, SAW THE SEA RETREATING QUICKLY AND ALERTED PANIC OVER THE COMING WAVE; SHE SAVED DOZENS OF RESORTS THAT WERE NEARBY. THERE IS A WAITING TO ENTER THE SEA THAT "DRINK" TO THE SEA