Research ArticleSeismology

Evidence for partial melt in the crust beneath Mt. Paektu (Changbaishan), Democratic People’s Republic of Korea and China

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Science Advances  15 Apr 2016:
Vol. 2, no. 4, e1501513
DOI: 10.1126/sciadv.1501513

Figures

  • Fig. 1 Station locations.

    Seismic stations used in the RF study (red circles). DPRK stations are Jang Gun Peak (JGPD), Paektu Bridge (PDBD), Mudu Peak (MDPD), Sin Mu Song (SMSD), Paek San Ri (PSRD), and Sing Hung Ri (SHRvD).

  • Fig. 2 Example RFs.

    (A and B) All RFs generated at stations PDBD (A) and SHRD (B). Three-digit number between radial and transverse components refers to the earthquake back azimuth.

  • Fig. 3 H-κ stacking results.

    (A) PDBD. (B) MDPD. (C) SMSD. (D) PSRD. (E) SHRD.

  • Fig. 4 RF migrations beneath Mt. Paektu.

    (A) Map shows stations (red circles) and piercing points (blue circles) at the crust-mantle boundary (assuming a crustal thickness of 35 km and an IASP91 velocity model). (B) Elevation along profile A-A′ shown in (A). (C) VP/VS estimated from H-κ stacking [blue circles are related to the crustal thickness solution in (D) and red stars are related to the crustal thickness in (E)]. (D) RF migrations assuming a crustal velocity with the lower VP/VS solution at PDBD and MDPD. (E) RF migrations assuming a crustal velocity with the higher VP/VS solution at PDBD and MDPD.

Tables

  • Table 1 Station details and H-κ stacking results.
    StationSensorLatitude (°)Longitude (°)Elevation (km)H (km)VP/VSVP (km s−1)Number of RFs
    JGPDESP41.994128.0832.6486.223
    PDBD*40T41.987128.1262.16433±1
    39±1
    2.11±0.02
    1.94±0.03
    6.252
    MDPD*ESP41.970128.1981.79932±2
    39±3
    2.06±0.12
    1.87±0.11
    6.230
    SMSDESP41.966128.3181.44336±11.84±0.036.538
    PSRD40T41.938128.6221.10135±11.76±0.056.56
    SHRDESP41.946128.7911.04135±11.79±0.046.548

    *These stations yielded two H-κ stacking solutions as shown in the columns for H and VP/VS. See the text for details.