Achievements and prospects of global broadband seismographic networks after 30 years of continuous geophysical observations 由 Ringler, AT, Anthony, RE, Aster, RC, Ammon, CJ, Arrowsmith, S, Benz, H, Ebeling, C, Frassetto, A, Kim, W-Y, Koelemeijer, P, Lekic, V, Lau, H, Montagner, J-P, Richards, PG, Schaff, DP, Vallée, M, Yeck, W