.leaflet-control-locate-location circle {
  animation: leaflet-control-locate-throb 4s ease infinite;
}

@keyframes leaflet-control-locate-throb {
  0% {
    stroke-width: 1;
  }
  50% {
    stroke-width: 3;
    transform: scale(0.8, 0.8);
  }
  100% {
    stroke-width: 1;
  }
}