聯邦國家海洋暨大氣管理局(NOAA)表示，本月稍早的暴風雨罕見地在東岸造成海嘯。該局6月13日 從30多個東岸海潮觀測站發現該暴風雨系引起海嘯，這些資料包括百慕達和波多黎各的海浪高度。
NOAA表示，當天最高的振幅在羅德島州新港市測得，不過新港市海浪的最高峰僅到海平面上1呎。新澤西州大西洋城和維吉尼亞州Kiptopeke測到類似的浪高。
新州海洋郡居民柯恩（Brian Coen）當天在Barnegat釣魚，在下午3時30分，他目睹岸邊的海水急退。他說，近海岸的防波堤本來在水面下三、四呎，但海水退卻時，防波堤的堤頂一度露出水面。之後，六呎（1.8米 ）高的浪頭從海中撲向陸地，三名在海邊的泳客被捲出防波堤，又被海浪拋回防波堤，兩人因此受傷，必須送醫治療。
羅德島州北Kingstown的Wickford遊艇俱樂部工作人員艾伯索爾說，他看到一道急流以7節或每小時8哩的速度，流入Narragansett灣。他表示，平常海流的流速只有每小時1到2哩。他說，因為退潮的速度太大，一艘船被海水帶走時將碼頭上的固定栓拔除。
稍後，浪潮再度以同樣的速度湧回，附近的觀測計測到的浪高為1.3呎。
科學家企圖查出海嘯的原因，NOAA表示，一個當天通過該區、向外海移動的暴風雨可能是造成海嘯的原因。政府氣象專家表示，海嘯的原因很複雜，但造成暴風雨的強烈氣壓變化，至少是造成海嘯的部分原因。
艾伯索爾說，海嘯只造成兩艘船和碼頭輕微損壞。他說：「當天一度我以為只是暴風雨帶來的氣候反常。」
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同類報導
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NOAA:
Rare Tsunami Hit East Coast Earlier This Month June 25, 2013
Above: Storm systems growing more intense: A radar image of the storm complex that may have caused the East Coast tsunami.
A storm that blew through earlier this
month might have spurred a rare phenomenon for the East Coast: a tsunami.
The
tsunami was observed June 13 at more than 30 tide gages along the East Coast,
Bermuda and Puerto Rico, the National Oceanic and Atmospheric Administration
said. The highest peak amplitude was recorded
in Newport Kiptopeke , Va. , and Atlantic City , N.J.
Brian
Coen was spearfishing at Barnegat Inlet in Ocean County, N.J., around 3:30 p.m.
on June 13, when he saw a strong outrush of water as the tide went out,
according to a description provided by NOAA. He said it carried divers over
submerged rocks that serve as a breakwater. The rocks, normally three to four
feet deep, eventually were exposed, he said.
Then, according to NOAA, Coen saw an approximately
6-foot wave come in. It carried the divers back over the breakwater and also
swept three people off rocks that are usually five to six feet above sea level.
Two of them needed medical attention.
Chuck Ebersole, steward at Wickford Yacht
Club in North Kingstown , R.I. ,
said he saw a strong current of about 7 knots, or 8 miles per hour, going out
through a channel into Narragansett Bay .
Normally, he said, the current is 1 to 2 miles per hour. The current was so
strong that one large boat pulled its cleat out of the dock, he said.
After a while, the current reversed at the
same speed, he said. A nearby gage recorded that the sea level changed by 1.3
feet.
Scientists are trying to determine the
cause, but NOAA said the tsunami may have been related to a strong storm that
moved through the region and offshore that day. Government forecasters said the
source was complex but that strong atmospheric pressure fluctuations indicate
it was at least partly caused by the weather.
At the yacht club, there was only minor
damage to the dock and two boats, Ebersole said.
“For a little
while there, I thought it might have been some runoff from the storms we had
that week, but it was too much water for that,” he said. “It was very exciting
at the time.”
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Rare
tsunami may have hit Jersey Shore
Rare
Tsunami Hits East Coast...
Tsunami
may have hit East Coast earlier in June 13, 2013
