今日（23日）早上6點28分左右，以日高地方東部為震央發生規模5.6的地震。北海道境內的浦河町與樣似町觀測到震度4的搖晃。截至上午8點30分，目前尚無因這起地震造成的人員傷亡或住家損害，生活機能與交通也未受到影響。Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)

綜合外媒報導，樣似町公所職員表示，當時他人在家中，伴隨一聲轟隆聲出現強烈搖晃，持續了約30秒。之後前往公所上班，目前尚未接獲任何災情通報。浦河町公所警衛說，當時正在巡邏，發生有點大的搖晃，架子上的文件因此掉下來。

根據觀測資料，震度達到4的地區包括日高地區的浦河町與樣似町。震度3的地區則有釧路市、襟裳町、新日高町、大樹町、廣尾町、幕別町與浦幌町等地。

文章出自: https://www.chinatimes.com/realtimenews/20250523001316-260408
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.