Rubuta ci gaba don wannan sakin layi - Lokacin da Lake Cahuilla ya wanzu, girgizar kasa ta mutum ta haifar da yawan ƙaura. Ruwan tafkin Cahuilla sun nuna sifofin lalacewa masu kama da waɗanda suka samo asali daga girgizar ƙasa ta San Fernando ta 1971
a cikin Van Norman Reservoir na Los Angeles Aqueduct. Wadannan sifofin lalacewa sun samo asali ne ta hanyar liquefaction na ƙasa. Ruwan tafkin Coachella ya ba da shaidar girgizar ƙasa guda takwas, wanda ya faru tsakanin 906 <unk> 961, 1090 <unk> 1152, 1275 <unk> 1347, 1588 <unk> 1662, da 1657 <unk> 1713. Kadan tabbataccen lokaci ne na abubuwan da suka faru tsakanin 959 <unk> 1015 da 1320 <unk> 1489.