A storm that blew through earlier this month might have spurred a rare phenomenon for the East Coast: a tsunami. Tsunami-like conditions were observed June 13 at more than 30 tide gauges along the East Coast, Bermuda and Puerto Rico, the National Oceanic and Atmospheric Administration said. The highest peak amplitude was recorded in Newport, R.I, where it reached just under a foot above sea level. Gages in Kiptopeke, Va., and Atlantic City, N.J., recorded similar peaks, NOAA said. ‘‘From North Carolina up through Massachusetts, we can find that signal, even though it’s very small, which tells us there was something going on,’’ Mike Angove, head of NOAA’s tsunami program, said Tuesday. ‘‘We’re trying to piece this back together.’’ A strong storm moved through the region and offshore that day, and scientists were trying to determine if it played a role.