Analysis of the GNSS Data recorded at the Everest Pyramid Laboratory during the Nepal EarthquakeGiorgio Poretti, Federico Morsut and Franco Pettenati.

18-20 February 2016 - Conference in Memory of Giorgio Manzoni

VC Liceo Scientifico G. Oberdan 1958

The epicentres of the 2015 earthquake and the GPS recording stations

The first location of the permanent GPS station (until 2012)

The Himalayan GPS network

Islamabad (Bahria University) Muzaffarabad (AJK University)

Gilgit (KI University)

•250 m

Stazione sismologica IO-EVN

Drumplot of vertical component IO-EVN, 25 AprilBroadband seismometer IO-EVN – 200 km from epicentre

Probability Density Functions (PDF),

(McNamara D. E. & Boaz R. I., 2005), for EVN at Pyramid

20/04/15 Latitude N Longitude E Elevation U RMS-N RMS-E RMS-U

KIT3 12334M001 39,1347674 66,8854486 622,49582 0,00024 0,00038 0,00098

LCK3 22305M004 26,9121795 80,9556361 64,1839 0,00032 0,00036 0,00134

LCK4 22305M005 26,9121428 80,955617 64,19937 0,00032 0,00036 0,00134

LHAZ 21613M002 29,6573335 91,1040304 3624,60579 0,00024 0,00034 0,001

P218 27,9575383 86,8149578 5032,25662 0,00044 0,00053 0,00205

30/04/15 Latitude N Longitude E Elevation U RMS-N RMS-E RMS-U

LCK3 22305M004 26,9121796 80,9556361 64,19109 0,00034 0,00057 0,00153

LCK4 22305M005 26,9121429 80,955617 64,20671 0,00034 0,00057 0,00153

LHAZ 21613M002 29,6573335 91,1040304 3624,61372 0,00001 0,00001 0,00001

P218 27,9575381 86,8149576 5032,24804 0,0004 0,00056 0,00203

Before and after the earthquake

Delta North Delta East Delta Elevation

P218 P218 -0,016 -0,023 0,034

EPOCH dN dE dU TIME SdN SdE SdU

6490 0,0044 0,0052 0,0039 25/04/2015 06:07:00 4,0329 3,036 11,3416

6491 0,0066 0,0074 0,0022 25/04/2015 06:07:30 4,0395 3,0434 11,3438

6492 0,0038 0,0081 0,0002 25/04/2015 06:08:00 4,0433 3,0515 11,344

6493 0,0112 0,0041 0,0065 25/04/2015 06:08:30 4,0545 3,0556 11,3505

6494 0,0095 0,0049 -0,0012 25/04/2015 06:09:00 4,0640 3,0605 11,3493

6495 0,0121 0,001 -0,0024 25/04/2015 06:09:30 4,0761 3,0615 11,3469

6496 0,0068 0,0085 0,0143 25/04/2015 06:10:00 4,0829 3,07 11,3612

6497 0,0067 0,004 0,0167 25/04/2015 06:10:30 4,0896 3,074 11,3779

6498 0,0072 0,007 0,0011 25/04/2015 06:11:00 4,0968 3,081 11,379

6499 0,0106 0,0091 0,0061 25/04/2015 06:11:30 4,1074 3,0901 11,3851

6500 0,0089 0,0065 0,006 25/04/2015 06:12:00 4,1163 3,0966 11,3911

6501 0,0112 0,0104 0,0029 25/04/2015 06:12:30 4,1275 3,107 11,394

6502 0,0095 0 0 25/04/2015 06:13:00 4,1370 3,107 11,394

6503 0,0012 -0,0006 0,0056 25/04/2015 06:13:30 4,1382 3,1064 11,3996

6504 -0,0061 -0,004 0,0035 25/04/2015 06:14:00 4,1321 3,1024 11,4031

6505 -0,0087 0,0011 -0,0094 25/04/2015 06:14:30 4,1234 3,1035 11,3937

6506 0,0097 -0,0047 -0,0049 25/04/2015 06:15:00 4,1331 3,0988 11,3888

6507 -0,004 -0,0049 -0,0278 25/04/2015 06:15:30 4,1291 3,0939 11,361

6508 -0,0107 0,0003 -0,0133 25/04/2015 06:16:00 4,1184 3,0942 11,3477

6509 -0,007 -0,0027 -0,0009 25/04/2015 06:16:30 4,1114 3,0915 11,3468

SDN

25.4.2015

M7.8

26.4.2015

M6.7

The epicentres of the 12 April 2015 earthquake and the GPS recording stations

The Geodetic station of Nagarkot

Kathmandu

-5

0

5

10

15

20

25

30

35

40

45

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

S(dN-m)

S(dE-m)12.5.2015

M7.3

Terremoto Gorkha 25.04.15

Seismicity from 25.04.15 to 08.06.2015

Geophysical Journal International

Adhikari et al., pp. 2119-2124

Drumplot of vertical component IO-EVN, 25 AprilBroadband seismometer IO-EVN – 200 km from epicentre

Probability Density Functions (PDF),

(McNamara D. E. & Boaz R. I., 2005), for EVN at Pyramid

Thank you for your attention!