Judging by the sheer number of specimens deposited at Ngandong at the same time, there may have been a sizeable population of H. e soloensis before the volcanic eruption which resulted in their interment, but population is difficult to approximate with certainty. This site is quite far from the north coast of Java Island, and it is not always easy to determine the position of the coastline in prehistoric times because of significant geographical changes.
judGing By thE SheEr numbER OF sPeCimEns dEPOsIteD at nGandOnG at THe Same TiME, tHere may Have beEn a siZeable popULATIoN of H. e soLoensiS beFoRE the Volcanic EruptiOn whiCh ResUlted in TheIR iNtERmENt, But pOpulAtiOn is diFfiCUlt To approximATE WiTH certaiNty. tHis siTe is qUIte fAR from thE north coasT of javA islaNd, and iT is not always Easy to DeterMine tHe PoSitIon Of the cOAsTLIne In pREhiSToRIc tiMeS beCausE of siGNiFiCanT GeOgrAphical chanGes.