Jones & Phinney Tables

Jones & Phinney Tables, Sierran RFs, v.6 12 March 1997

Table 2. Fiducial Velocity Structure For Mapping Receiver Functions From Time To Depth

Table 1. Locations of seismometers

Array
Stn Instr. Type Latitude (deg.N) Longitude (deg.W) Elevation(m)
MK W5 CMG-3 36.4555 -118.6212 2232
W4 L4-3D 36.4537 -118.6160 2289
W3 L4-3D 36.4533 -118.6104 2311
W2 L4-3D 36.4542 -118.6054 2328
W1 L4-3D 36.4543 -118.6008 2374
00 CMG-3 36.4543 -118.5952 2430
S1 L4-3D 36.4498 -118.5931 2395
S2 L4-3D 36.4452 -118.5917 2424
S3 L4-3D 36.4409 -118.5902 2436
S4 L4-3D 36.4370 -118.5872 2451
S5 CMG-4 36.4333 -118.5835 2532
HM 00 CMG-3 36.4605 -118.1845 3155
N1 L4-3D 36.4652 -118.1821 3085
N2 L4-3D 36.4700 -118.1818 3170
N3 L4-3D 36.4751 -118.1817 3225
N4 L4-3D 36.4797 -118.1790 3124
N5 CMG-3 36.4871 -118.1776 3133
W1 L4-3D 36.4594 -118.1868 3155
W2 L4-3D 36.4604 -118.1935 3185
W3 L4-3D 36.4599 -118.1985 3194
W4 L4-3D 36.4554 -118.2067 3237
W5 CMG-3 36.4570 -118.2155 3459
DP 00 CMG-4 36.2647 -117.6593 1713
E1 HS-10 36.2647 -117.6534 1740
E2 HS-10 36.2646 -117.6482 1734
E3 HS-10 36.2640 -117.6424 1698
E4 CMG-4 36.2658 -117.6375 1684
W1 HS-10 36.2655 -117.6647 1696
W2 HS-10 36.2659 -117.6702 1686
W3 HS-10 36.2650 -117.6756 1676
W4 CMG-4 36.2636 -117.6806 1669

Table 2. Fiducial Velocity Structure For Mapping Receiver Functions From Time To Depth

Depth	P-velocity
-2	5.5
0	6.0
30	6.4
40	7.5
50	7.9
90	7.92
130	8.03
170	8.16
210	8.29
250	8.42

Velocities between depths listed are linearlly interpolated

Poisson's ratio of 0.25 used in this structure

Table 3a. Quality estimates of receiver functions and Moho Ps picks for beamed short-period seismograms of teleseismic events

	Ps picks			Blunder Index (BI)			Variance reduction			Residual variance/Noise variance
Event	MK	HM	DP	MK	HM	DP	MK	HM	DP	MK	HM	DP
215.Egypt*	5.2+/-0.4	4.5+/-0.5	4.1+/-0.4	4.5	4	5.2	69	66	55	0.72	0.85	0.52
263.CentMidAtlR	4.6+/-0.4	4.0+/-0.9	-	3.1	3.2	-	79	73	-	1.3	1.5	-
203.NoColombia	3.9+/-0.6	4.5+/-0.5	-	1.5	3.3	-	93	95	-	8.3	11.8	-
234.Guatemala	4.0+/-0.4^SS	4.4+/-0.3	4.0+/-0.4	3.4	3.0	3.2	79	81	86	0.60	3.6	2.1
254.N_Peru	4.1+/-0.4	4.3+/-0.5	4.2+/-0.7	2.6	3.6	3.5	90	92	90	2.0	2.9	2.3
292.JujuyArgen	+	-	3.9+/-0.2	1.9	-	3.6	77	-	79	2.8	-	2.4
280.CentPeru	4.1+/-0.6	4.3+/-0.4	4.2+/-0.6	3.8	3.2	5.2	82	79	85	1.4	1.3	1.3
270.S Atl Oc*	5.2+/-0.5	4.0+/-0.4	4.1+/-0.8	4.0	3.2	4.8	81	78	65	0.69	1.0	0.92
203.SoEPR	+	3.9+/-0.7	-	3.9	2.8	-	59	65	-	0.69	2.6	-
222.OfWCSouthIs*	4.1+/-0.4	3.8+/-1.4	4.0+/-0.6	4.2	3.6	5.2	66	71	31	0.65	0.59	0.80
225.OfECNorthIs	5.0+/-0.2**	3.6+/-0.5^tt	-	2.2	3.1	-	72	68	-	1.2	0.96	-
233.FijiIs	5.1+/-0.4	5.4+/-0.5	3.9+/-0.5	3.4	3.3	4.0	77	92	77	9.0	13.	2.6
284.FijiIsl	5.2+/-0.4	6.5+/-0.4	-	4.3	3.3	-	68	91	-	93.	3.4	-
286.ENewGuin	4.8+/-0.3	4.3+/-0.3	3.9+/-0.4	2.3	2.3	2.7	86	79	85	5.2	1.0	4.1
203.Marianas	+	4.5+/-0.4	-	2.0	2.3	-	83	85	-	1.5	9.6	-
284.SoHonshu	tt	4.5+/-0.4	4.1+/-1.2	2.4	2.6	4.7	90	80	87	430.	8.4	3.3
219.HokkJap	5.0+/-0.5	4.4+/-0.4	4.1+/-0.6	1.4	1.8	4.5	96	88	96	7.7	27.	7.7
246.AlaskaPen	5.3+/-0.3	4.6+/-0.4	4.2+/-0.2**	3.4	3.3	4.8	47	55	81	1.1	1.1	0.56
278.SXinjiang	4.6+/-0.9	+	^tt	5.2	5.7	5.7	60	22	68	0.81	1.1	1.0
272.S_India	+	+	^tt	3.3	5.0	5.4	50	35	96	1.1	1.1	0.72
221.HinduK.a*	4.7+/-0.4	3.6+/-0.4	4.2+/-0.3	4.1	3.3	5.2	66	63	78	na	na	na

* indicate events where PP phase was used (delta is distance to bounce point, in this case)

+ indicates Ps conversion not above noise level.

^tt indicates Ps was accompanied by several adjacent pulses making identification of Moho Ps difficult or potentially ambiguous.

^SS picked from Ps on Z-r deconvolution; not above noise on L-H deconvolution.

** Ps noticeably larger than nearby signal but below noise level.

Uncertainty on Ps picks (from Moho) are widths of pulse (i.e., pulse 1 s wide produced uncertainty of 0.5 s).

Blunder Index (BI): 1 is best, higher is worse. Attempts to indicate likelihood of a blunder in assigning the Ps pick made to the Moho along the presumed raypath. Quality = 1 + 1 if L-H decon has pulse > 1[sigma] centered at 0 offset + 0.5 if L-H >1[sigma] at 0 offset from pulse off 0 + 1 if Z-t (transverse) decon > 1 [sigma] at 0 offset + 0.5 if a pulse > 1 [sigma] is on L-H decon preceeding 0 offset + 0.5 for each 10% the variance reduction is below 80% + 0.5 for residual/noise variance below 1.0 (0.8 for PP) + 0.5 for residual/noise variance below 0.8 (0.6 for PP) + (11/(number of stations) -1). If a trace has an undesired pulse near but not exceeding 1 [sigma] level, half the penalty listed is added.

Variance reductions are weighted variance reductions of L-H components deconvolution to avoid considering the variance reduction from fitting the direct P as significant.

Residual variance/noise variance are ratios of unweighted variances for L-H deconvolution. Values less than one indicate overfitting of radial waveform (except possibly for events where PP was used, where pre-arrival noise might include energy from other phases).

Table 3b. Quality estimates of receiver functions and Moho Ps picks for beamed broadband seismograms of teleseismic events

	Ps picks			Blunder Index (BI)			Variance reduction			Residual variance/Noise variance
Event	MK	HM	DP	MK	HM	DP	MK	HM	DP	MK	HM	DP
215.Egypt*	+	-	-	3.0	-	-	74	-	-	0.68	-	-
263.CentMidAtlR	-	-	-	-	-	-	-	-	-	-	-	-
203.NoColombia	3.9+/-0.4	4.4(+0.9/-0.3)	-	2	1.2	-	91	98	-	1.2	1.5	-
234.Guatemala	-	-	-	-	-	-	-	-	-	-	-	-
254.N_Peru	+	4.3+/-0.5	-	3.2	2.8	-	84	95	-	0.59	0.32	-
292.JujuyArgen	+	-	4.7+/-0.7	3.5	-	3.5	69	-	78	0.42	-	1.0
280.CentPeru	5.2+/-0.3	+	-	5.2	3.0	-	45	76	-	1.4	0.79	-
270.S Atl Oc*	-	+	-	-	1.5	-	-	91	-	-	0.84	-
203.SoEPR	+	3.9+/-0.5	-	4.5	2.5	-	58	70	-	0.83	0.42	-
222.OfWCSouthIs*	-	4.0+1.6/-0.5	3.6+/-0.7	-	2.0	3.5	-	98	92	-	0.89	0.38
225.OfECNorthIs	5.0+/-0.9**	4.5+/-1.5	-	5.5	4.5	-	42	63	-	0.47	0.69	-
233.FijiIs	5.3+/-0.8**	-	3.9+/-1.3	2.0	-	4.0	77	-	94	1.5	-	0.99
284.FijiIsl	5.3+/-0.5	4.4+/-0.4	-	3.0	4.0	-	79	76	-	0.84	0.91	-
286.ENewGuin	4.8+/-0.5	4.3+/-0.8**	-	3.2	2.2	-	92	80	-	0.94	0.83	-
203.Marianas	4.9+/-0.9	4.4+/-0.3	-	2.0	3.2	-	90	92	-	0.76	0.76	-
284.SoHonshu	4.8+/-0.3^tt	4.3+/-0.4^tt	-	1.8	2.5	-	94	97	-	4.1	2.1	-
219.HokkJap	4.9+/-0.8	4.3+/-0.6	-	1.5	1.25	-	96	91	-	2.3	1.6	-
246.AlaskaPen	+	-	-	3.0	-	-	53	-	-	1.0	-	-
278.SXinjiang	4.8+/-1.0**	+	-	4.5	4.0	-	80	61	-	0.62	1.1	-
272.S_India	+	+	-	2.5	4.5	-	81	69	-	1.0	0.51	-
221.HinduK.a*	-	+^tt	-	-	2.5	-	-	95	-	-	na	-

* indicate events where PP phase was used (delta is distance to bounce point, in this case)

+ indicates Ps conversion not above noise level.

^tt indicates Ps was accompanied by several adjacent pulses making identification of Moho Ps difficult or potentially ambiguous.

^SS picked from Ps on Z-r deconvolution; not above noise on L-H deconvolution.

** Ps noticeably larger than nearby signal but below noise level.

Uncertainty on Ps picks (from Moho) are widths of pulse (i.e., pulse 1 s wide produced uncertainty of 0.5 s).

BI (Blunder Index): 1 is best, higher is worse. Attempts to indicate likelihood of a blunder in assigning the Ps pick made to the Moho along the presumed raypath. Quality = 1 + 1 if L-H decon has pulse > 1[sigma] centered at 0 offset + 0.5 if L-H >1[sigma] at 0 offset from pulse off 0 + 1 if Z-t (transverse) decon > 1 [sigma] at 0 offset + 0.5 if a pulse > 1 [sigma] is on L-H decon preceeding 0 offset + 0.5 for each 10% the variance reduction is below 80% + 0.5 for residual/noise variance below 1.0 (0.8 for PP) + 0.5 for residual/noise variance below 0.8 (0.6 for PP) + (3/(number of stations) -1) If a trace has an undesired pulse near but not exceeding 1 [sigma] level, half the penalty listed is added.

Variance reductions are weighted variance reductions of L-H components deconvolution to avoid considering the variance reduction from fitting the direct P as significant.

Table 4. Crustal thickness inferred from receiver functions assuming crustal P velocity of 6.2 km/s and Poisson's ratio of 0.255

Crustal thickness, km
Short period beams

Short period
Pick BI*

Crustal thickness, km
Broadband beams

Broadband
Pick BI*

215.Egypt*

41.2+/-3.2

35.7+/-4.0

32.5+/-3.2

5.0

5.2

263.CentMidAtlR

37.6+/-3.3

32.7+/-7.4

4.1

3.2

203.NoColombia

30.8+/-4.7

35.6+/-4.0

2.5

3.3

30.8+/-3.2

34.8+/-4.7

2.0

1.2

234.Guatemala

31.0+/-3.1

34.1+/-2.3

31.0+/-3.1

3.9

3.0

3.2

254.N_Peru

32.6+/-3.2

34.2+/-4.0

33.4+/-5.6

3.6

3.5

34.2+/-4.0

2.8

292.JujuyArgen

31.6+/-1.6

3.6

38.1+/-5.7

3.5

280.CentPeru

32.8+/-4.8

34.4+/-3.2

33.6+/-4.8

4.8

3.7

6.7

41.6+/-2.4

5.2

270.S Atl Oc*

41.2+/-4.0

31.7+/-3.2

32.5+/-6.3

4.0

3.2

4.8

203.SoEPR

31.9+/-5.7

4.3

31.9+/-4.1

3.5

222.OfWCSouthIs*

32.4+/-3.2

30.1+/-11.1

31.7+/-4.7

4.2

4.6

5.2

31.7+/-7.9

28.5+/-5.5

2.0

4.0

225.OfECNorthIs

40.9+/-1.6

29.4+/-4.1

3.2

4.1

40.9+/-7.4

36.8+/-12.3

6.0

4.5

233.FijiIs

41.5+/-3.3

43.9+/-4.1

31.7+/-4.1

3.4

3.3

4.0

43.1+/-6.5

31.7+/-10.6

3.0

4.0

284.FijiIsl

42.2+/-3.2

52.8+/-3.2

4.3

3.8

43.0+/-4.1

35.7+/-3.2

3.0

4.0

286.ENewGuin

39.3+/-2.5

35.2+/-2.5

31.9+/-3.3

2.3

2.7

39.3+/-4.1

35.2+/-6.5

3.2

2.7

203.Marianas

36.6+/-3.3

3.3

39.9+/-7.3

35.8+/-2.4

2.5

3.2

284.SoHonshu

36.6+/-3.3

33.3+/-9.8

3.6

4.7

39.0+/-2.4

35.0+/-3.3

2.8

3.5

219.HokkJap

40.4+/-4.0

35.5+/-3.2

33.1+/-4.8

1.4

1.8

4.5

39.6+/-6.5

34.7+/-4.8

1.5

1.25

246.AlaskaPen

41.1+/-2.3

35.6+/-3.1

32.5+/-1.5

3.4

3.3

5.3

278.SXinjiang

37.7+/-7.4

5.2

39.3+/-8.2

5.0

272.S_India

221.HinduK.a*

37.2+/-3.2

28.5+/-3.2

33.3+/-2.4

4.1

3.3

5.2

* pick BI is the receiver function BI (Table 3) plus 1.0 for a precursor or multiple arrival, or 0.5 for a marginally significant Ps.

Table 5. Mean Moho depth below sea level and best fitting dipping Mohos assuming crustal P velocity of 6.2 km/s and Poisson's ratio of 0.255

MK
HM DP

shallow Ps deep Ps all all drop 225-239°*

Mean +/- error 30.6+/-0.4 38.0+/-0.4 36.2+/-0.6 32.2+/-0.7 31.3+/-0.8 30.6+/-0.8

Dipping plane

Depth beneath site 30.8+/-0.4 37.8+/-0.4 35.8+/-0.7 31.5+/-0.8 31.7+/-0.2 30.5+/-0.3
Dip direction 350° 200° 270° 230° 000° 030°
Dip 3° 5° 10° 20° 6° 4°
Mean is weighted mean of SP and BB picks using pulse half widths as though standard errors (Table 4) except for shallow and deep Ps at MK, where only SP picks are used but supplemented by additionbal picks of secondary arrivals not in Table 4.
Shallow Ps at MK mostly to southeast; deep Ps from most backazimuths. Dipping plane a fit using a multiple linear regression to (east, north, depth) points for Moho penetration along Ps ray for each event. Dip uncertainties are usually 3-5°.
Moho depths can be adjusted for other crustal parameters using the curves in Figure 5, e.g., [nu] = 0.24 produces a Moho ~1.5 km shallower than listed here.
* ignoring picks for events in this backazimuth range, where extreme bending of the raypath and possible multipathing appear to exist.

Return to Jones and Phinney manuscript
Return to SSCD 1992-5 project page

755 visits from Tue, Apr 21 1998 17:07 to Apr/ 6/02 20:45

Array	Stn	Instr. Type	Latitude (deg.N)	Longitude (deg.W)	Elevation(m)
MK	W5	CMG-3	36.4555	-118.6212	2232
	W4	L4-3D	36.4537	-118.6160	2289
	W3	L4-3D	36.4533	-118.6104	2311
	W2	L4-3D	36.4542	-118.6054	2328
	W1	L4-3D	36.4543	-118.6008	2374
	00	CMG-3	36.4543	-118.5952	2430
	S1	L4-3D	36.4498	-118.5931	2395
	S2	L4-3D	36.4452	-118.5917	2424
	S3	L4-3D	36.4409	-118.5902	2436
	S4	L4-3D	36.4370	-118.5872	2451
	S5	CMG-4	36.4333	-118.5835	2532
HM	00	CMG-3	36.4605	-118.1845	3155
	N1	L4-3D	36.4652	-118.1821	3085
	N2	L4-3D	36.4700	-118.1818	3170
	N3	L4-3D	36.4751	-118.1817	3225
	N4	L4-3D	36.4797	-118.1790	3124
	N5	CMG-3	36.4871	-118.1776	3133
	W1	L4-3D	36.4594	-118.1868	3155
	W2	L4-3D	36.4604	-118.1935	3185
	W3	L4-3D	36.4599	-118.1985	3194
	W4	L4-3D	36.4554	-118.2067	3237
	W5	CMG-3	36.4570	-118.2155	3459
DP	00	CMG-4	36.2647	-117.6593	1713
	E1	HS-10	36.2647	-117.6534	1740
	E2	HS-10	36.2646	-117.6482	1734
	E3	HS-10	36.2640	-117.6424	1698
	E4	CMG-4	36.2658	-117.6375	1684
	W1	HS-10	36.2655	-117.6647	1696
	W2	HS-10	36.2659	-117.6702	1686
	W3	HS-10	36.2650	-117.6756	1676
	W4	CMG-4	36.2636	-117.6806	1669

	MK			HM		DP
	shallow Ps	deep Ps	all	all	drop 225-239°*
Mean +/- error	30.6+/-0.4	38.0+/-0.4	36.2+/-0.6	32.2+/-0.7	31.3+/-0.8	30.6+/-0.8
Dipping plane
Depth beneath site	30.8+/-0.4	37.8+/-0.4	35.8+/-0.7	31.5+/-0.8	31.7+/-0.2	30.5+/-0.3
Dip direction	350°	200°	270°	230°	000°	030°
Dip	3°	5°	10°	20°	6°	4°