Sound travels

photo:typicallyspanish.com
We were sitting on our Solarium last night and heard two muffled explosions, definitely sounded different to fireworks, we wondered what it was and we see on the news this morning that two acetylene bottles exploded in the Ciudad de Asís area of Alicante, the resulting fire closed the railway line and three long distance trains were affected by the stoppage, but the quick action of the firefighters has meant that train services have now returned to normal.