（22:43更新--深度修正、海嘯警報影片）南美洲南端阿根廷近海德雷克海峽（Drake Passage）海域，在台灣時間2日晚間8時58分發生規模7.5強震，地震深度位於海底以下10公里。美國海嘯警報系統已發布海嘯威脅（threat）。

綜合日本時事通信社、中國大陸《環球時報》西班牙語服務（CGTN Español）報導，阿根廷、智利兩國國境南端外海在當地時間2日上午8時58分發生強震，日本氣象廳稱規模7.5，歐洲地中海地震中心（EMSC）、美國地質調查所（USGS）資料顯示規模7.4。起初USGS、EMSC均稱地震深度超過40公里，之後雙雙修正為10公里，屬於極淺層地震；日本氣象廳資訊暫時顯示「深度不明」。

震央位於距離阿根廷南端大城烏斯華雅（Ushuaia）以南約227公里處的海域。強震發生後，網友也在社群平台發布智利南端威廉斯港（Puerto Williams）海嘯警報大作的短片。

文章出自: https://www.chinatimes.com/realtimenews/20250502004366-260408
The Log Periodic Antenna  as known as LPDA  is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies.
Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas.
The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.