Helmberger, Donald: search on Z-Library

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1

Generalized Ray Theory for a Layered Sphere

Freeman Gilbert, Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1972

Language:

english

File:

PDF, 957 KB

english, 1972

2

A two-dimensional P-SV hybrid method and its application to modeling localized structures near the core-mantle boundary

Wen, Lianxing, Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1998

Language:

english

File:

PDF, 1.46 MB

english, 1998

3

A lower mantle S-wave triplication and the shear velocity structure of D″

Thorne Lay, Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1983

Language:

english

File:

PDF, 1.74 MB

english, 1983

4

Lateral variations near the core-mantle boundary

Garnero, Edward, Helmberger, Donald, Engen, Gladys

Journal:

Geophysical Research Letters

Year:

1988

Language:

english

File:

PDF, 343 KB

english, 1988

5

Localized boundary layer below the mid-Pacific velocity anomaly identified from a PcP precursor

Mori, Jim, Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1995

Language:

english

File:

PDF, 613 KB

english, 1995

6

Imaging subducted slab structure beneath the Sea of Okhotsk with teleseismic waveforms

Zhan, Zhongwen, Helmberger, Donald V., Li, Dunzhu

Journal:

Physics of the Earth and Planetary Interiors

Year:

2014

Language:

english

File:

PDF, 12.40 MB

english, 2014

7

A Procedure for Modelling Shallow Dislocation Sources

Charles A. Langston, Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1975

Language:

english

File:

PDF, 668 KB

english, 1975

8

The upper mantle P velocity structure of the western United States

Burdick, L. J., Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1978

Language:

english

File:

PDF, 1.52 MB

english, 1978

9

A shear velocity discontinuity in the lower mantle

Lay, Thorne, Helmberger, Donald V.

Journal:

Geophysical Research Letters

Year:

1983

Language:

english

File:

PDF, 362 KB

english, 1983

10

Subducting Slab Ultra-Slow Velocity Layer Coincident with Silent Earthquakes in Southern Mexico

Song, T.-R. A., Helmberger, Donald. V., Brudzinski, M. R., Clayton, R. W., Davis, P., Perez-Campos, X., Singh, S. K.

Journal:

Year:

2009

Language:

english

File:

PDF, 726 KB

english, 2009

11

Synthetic seismograms from model ocean bottoms

Spudich, P. K. P., Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1979

Language:

english

File:

PDF, 1.31 MB

english, 1979

12

Evidence for a sharp lateral variation of velocity at the core–mantle boundary from multipathed PKPab

Sheng-Nian Luo, Sidao Ni, Donald V. Helmberger

Journal:

Earth and Planetary Science Letters

Year:

2001

Language:

english

File:

PDF, 579 KB

english, 2001

13

Further structural constraints and uncertainties of a thin laterally varying ultralow-velocity layer at the base of the mantle

Garnero, Edward J., Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1998

Language:

english

File:

PDF, 1.76 MB

english, 1998

14

Low-velocity zone variations in the southwestern United States

York, James E., Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1973

Language:

english

File:

PDF, 237 KB

english, 1973

15

Seismicity and stress-drop in the Eastern Transverse Ranges, southern California

Jones, Laura E., Helmberger, Donald V.

Journal:

Geophysical Research Letters

Year:

1996

Language:

english

File:

PDF, 443 KB

english, 1996

16

Broadband modelling along a regional shield path, Harvard recording of the Saguenay earthquake

Lian-She Zhao, Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1991

Language:

english

File:

PDF, 1.00 MB

english, 1991

17

The shear-wave velocity gradient at the base of the mantle

Lay, Thorne, Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1983

Language:

english

File:

PDF, 1.02 MB

english, 1983

18

Shear-velocity structure of the crust and upper mantle beneath the Tibetan Plateau and southeastern China

Lian-She Zhao, Donald V. Helmberger, David G. Harkrider

Journal:

Geophysical Journal International

Year:

1991

Language:

english

File:

PDF, 1.35 MB

english, 1991

19

The Oroville Earthquakes: A study of source characteristics and site effects

Cohn, Stephen N., Hong, Tai-Lin, Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1982

Language:

english

File:

PDF, 1.13 MB

english, 1982

20

Regional moments, energy levels, and a new discriminant

Lian-She Zhao, Donald V. Helmberger

Journal:

Pure and Applied Geophysics

Year:

1996

Language:

english

File:

PDF, 1.23 MB

english, 1996

21

Source retrieval from broadband regional seismograms: Hindu Kush region

Zhao Lian-She, Donald V. Helmberger

Journal:

Physics of the Earth and Planetary Interiors

Year:

1993

Language:

english

File:

PDF, 1.96 MB

english, 1993

22

Upper mantle cross section from Tonga to Newfoundland

Graves, Robert W., Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1988

Language:

english

File:

PDF, 1023 KB

english, 1988

23

Constraining outermost core velocity with SmKS waves

Garnero, Edward J., Helmberger, Donald V., Grand, Stephen P.

Journal:

Geophysical Research Letters

Year:

1993

Language:

english

File:

PDF, 386 KB

english, 1993

24

Fine structure of an Aleutian crustal section

Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1977

Language:

english

File:

PDF, 490 KB

english, 1977

25

Depth Determination of the 2010 El Mayor‐Cucapah Earthquake Sequence ( M ≥4.0)

Yu, Chunquan, Hauksson, Egill, Zhan, Zhongwen, Cochran, Elizabeth S., Helmberger, Donald V.

Journal:

Journal of Geophysical Research: Solid Earth

Year:

2019

Language:

english

File:

PDF, 2.60 MB

english, 2019

26

Modelling D″ structure beneath Central America with broadband seismic data

Xiaoming Ding, Donald V. Helmberger

Journal:

Physics of the Earth and Planetary Interiors

Year:

1997

Language:

english

File:

PDF, 1.56 MB

english, 1997

27

Seismic source and structure estimation in the western Mediterranean using a sparse broadband network

Thio, Hong Kie, Song, Xi, Saikia, Chandan K., Helmberger, Donald V., Woods, Bradley B.

Journal:

Journal of Geophysical Research

Year:

1999

Language:

english

File:

PDF, 1.80 MB

english, 1999

28

Upper mantle shear structure

Helmberger, Donald V., Engen, Gladys R.

Journal:

Journal of Geophysical Research

Year:

1974

Language:

english

File:

PDF, 1.03 MB

english, 1974

29

Evidence for strong shear velocity reductions and velocity gradients in the lower mantle beneath Africa

Ritsema, Jeroen, Ni, Sidao, Helmberger, Donald V., Crotwell, H. Philip

Journal:

Geophysical Research Letters

Year:

1998

Language:

english

File:

PDF, 584 KB

english, 1998

30

A very slow basal layer underlying large-scale low-velocity anomalies in the lower mantle beneath the Pacific: evidence from core phases

Edward J. Garnero, Donald V. Helmberger

Journal:

Physics of the Earth and Planetary Interiors

Year:

1995

Language:

english

File:

PDF, 1.11 MB

english, 1995

31

A technique for the inversion of regional data in source parameter studies

Wallace, Terry C., Helmberger, Donald V., Mellman, George R.

Journal:

Journal of Geophysical Research

Year:

1981

Language:

english

File:

PDF, 736 KB

english, 1981

32

Short-period constraints on the proposed transition zone discontinuity

Jones, Laura E., Mori, Jim, Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1992

Language:

english

File:

PDF, 832 KB

english, 1992

33

A note on velocity, density, and attenuation models for marine sediments determined from multibounce phases

Helmberger, Donald V., Engen, Gladys, Scott, Pat

Journal:

Journal of Geophysical Research

Year:

1979

Language:

english

File:

PDF, 449 KB

english, 1979

34

A body-wave analysis of the 1966 Gisborne, New Zealand, earthquake

Terry H. Webb, S.G. Wesnousky, Donald V. Helmberger

Journal:

Year:

1985

Language:

english

File:

PDF, 709 KB

english, 1985

35

Regional waveform calibration in the Pamir-Hindu Kush region

Zhu, Lupei, Helmberger, Donald V., Saikia, Chandan K., Woods, Bradley B.

Journal:

Journal of Geophysical Research

Year:

1997

Language:

english

File:

PDF, 1.80 MB

english, 1997

36

Determination of source parameters at regional distances with three-component sparse network data

Dreger, Douglas S., Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1993

Language:

english

File:

PDF, 1.38 MB

english, 1993

37

The influence of site conditions on the spatial incoherence of ground motions

Paul G. Somerville, James P. McLaren, Mrinal K. Sen, Donald V. Helmberger

Journal:

Structural Safety

Year:

1991

Language:

english

File:

PDF, 676 KB

english, 1991

38

On the Structure of the Low Velocity Zone

Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1973

Language:

english

File:

PDF, 653 KB

english, 1973

39

Slip distribution and tectonic implication of the 1999 Chi-Chi, Taiwan, Earthquake

Ji, Chen, Helmberger, Donald V., Alex Song, Teh-Ru, Ma, Kuo-Fong, Wald, David J.

Journal:

Geophysical Research Letters

Year:

2001

Language:

english

File:

PDF, 608 KB

english, 2001

40

Seismic detection of a thin laterally varying boundary layer at the base of the mantle beneath the central-Pacific

Garnero, Edward J., Helmberger, Donald V.

Journal:

Geophysical Research Letters

Year:

1996

Language:

english

File:

PDF, 596 KB

english, 1996

41

Shear velocities at the base of the mantle from observations of S and ScS

Mitchell, Brian J., Helmberger, Donald V.

Journal:

Journal of Geophysical Research

Year:

1973

Language:

english

File:

PDF, 904 KB

english, 1973

42

A modified first-motion approximation for the synthesis of body-wave seismograms

George R. Mellman, Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1978

Language:

english

File:

PDF, 502 KB

english, 1978

43

Source parameters of the Sierra Madre Earthquake from regional and local body waves

Dreger, Douglas, Helmberger, Donald

Journal:

Geophysical Research Letters

Year:

1991

Language:

english

File:

PDF, 318 KB

english, 1991

44

A new seismic discriminant for earthquakes and explosions

Woods, Bradley B., Helmberger, Donald V.

Journal:

Eos Transactions American Geophysical Union

Year:

1993

Language:

english

File:

PDF, 273 KB

english, 1993

45

Broad-Band Modelling of Regional Seismograms: the Basin and Range Crustal Structure

Xi J. Song, Donald V. Helmberger, L. Zhao

Journal:

Geophysical Journal International

Year:

1996

Language:

english

File:

PDF, 1.07 MB

english, 1996

46

Intermediate depth earthquakes beneath the India-Tibet Collision Zone

Zhu, Lupei, Helmberger, Donald V.

Journal:

Geophysical Research Letters

Year:

1996

Language:

english

File:

PDF, 528 KB

english, 1996

47

Rupture complexity of the 1994 Bolivia and 2013 Sea of Okhotsk deep earthquakes

Zhan, Zhongwen, Kanamori, Hiroo, Tsai, Victor C., Helmberger, Donald V., Wei, Shengji

Journal:

Earth and Planetary Science Letters

Year:

2014

Language:

english

File:

PDF, 1.46 MB

english, 2014

48

Synthetic Seismogram Computation by Expansion in Generalized Rays

Ralph A. Wigginst, Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1974

Language:

english

File:

PDF, 849 KB

english, 1974

49

Upper mantle shear structure of North America

Stephen P. Grand, Donald V. Helmberger

Journal:

Geophysical Journal International

Year:

1984

Language:

english

File:

PDF, 1.68 MB

english, 1984

50

A travel time and amplitude interpretation of a marine refraction profile: Primary waves

Helmberger, Donald V., Morris, Gerald B.

Journal:

Journal of Geophysical Research

Year:

1969

Language:

english

File:

PDF, 594 KB

english, 1969

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