Vol­cano Ac­tiv­ity Up­dates

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This past week, Ki­lauea Vol­cano’s sum­mit lava lake level was rel­a­tively sta­ble, rang­ing 82–98 feet be­low the vent rim, with fluc­tu­a­tions in con­cert with sum­mit in­fla­tion and de­fla­tion. On the East Rift Zone, the 61g flow re­mained ac­tive, with lava en­ter­ing the ocean near Kamokuna and sur­face break­outs downs­lope of Puu Oo. The 61g flows do not pose an im­me­di­ate threat to nearby com­mu­ni­ties.

Mauna Loa is not erupt- ing. Dur­ing the past week, small-mag­ni­tude earth­quakes con­tin­ued to oc­cur be­neath the vol­cano, pri­mar­ily in the south caldera and up­per South­west Rift Zone, at depths less than 3 miles. GPS mea­sure­ments con­tinue to show de­for­ma­tion re­lated to in­fla­tion of a magma reser­voir be­neath the sum­mit and up­per South­west Rift Zone. No sig­nif­i­cant changes in vol­canic gas emis­sions were mea­sured.

One earth­quake with three or more felt re­ports oc­curred on the Is­land of Hawaii dur­ing the past week: On July 24, at 9:46 a.m. HST, a mag­ni­tude-3.3 earth­quake lo­cated 7 miles north of Kalaoa and 21 miles deep.

Plea­se­visit­theHVO web­site(https://vol­ca­noes.usgs.gov/hvo)for pastVol­canoWatchar­ti­cles,Ki­laueadai­lyerup­tionup­dates,Mau­naLoa week­lyup­dates,vol­cano pho­tos,re­cen­tearthquakesinfo,and­more. Call­for­sum­ma­ryup­dates at808-967-8862(Ki­lauea) or808-967-8866(Mauna Loa).Emailques­tions toaskHVO@usgs.gov.

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