They identified almost 175,000 \u201cPKP precursors,\u201d mysterious seismic signals that arrive at earthquake detectors before the main event, which can allow scientists to map the Earth\u2019s innermost structures. More specifically, scientists believe the precursors are triggered by \u201csmall heterogeneities\u201d just above the region where the Earth\u2019s solid mantle meets its liquid iron core, roughly 1,800 miles below the surface.<\/p>\n
While identifying these precursors has \u201ctraditionally required painstaking manual screening, a slow and laborious process,\u201d the researchers noted, the new algorithm allowed them to identify \u201croughly ten times more\u201d PKP precursors \u201cthan all previous studies combined.\u201d<\/p>\n
With this data in hand, the scientists set out to create what they claim to be the \u201cmost complete global map to date of potential small-scale heterogeneities in the Earth\u2019s deep interior,\u201d which includes six new areas that \u201chost significant heterogeneities that had never been documented before.\u201d<\/p>\n
\u201cWhereas previous studies could only identify sparse, isolated patches sampled by precursors, our results reveal that these potential heterogeneities may extend across broad regions in the form of continuous bands,\u201d the researchers concluded.<\/p>\n
![\"A](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2026\/09\/map-pkp_acc1d3.jpg\")
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The scientists suggest that these ancient structures \u2014 six larger groups spread out across the interior of the globe, as seen in the image above \u2014 could be related to subduction zones, where material that gets dragged deep below the surface is chemically altered by the extreme pressure and temperature of the core-mantle boundary. As Science Alert points out<\/a>, this can spur the material take on vastly different physical properties.<\/p>\n The data could help us identify the time or severity of future seismic activity \u2014 and bring us one small step closer in unraveling the mysteries surrounding the formation of the Earth\u2019s various layers and how tectonic plates formed.<\/p>\n