Summary:
| Map includes seismicity in the last 60 days within 55 Km of this event. | ||
| ► Magnitude (ML) | 4.21 | |
| ► Region | 20.5 mi N of Yerington | |
| ► Date time | 2026-04-19 at 12:43:31.056 UTC 2026-04-19 at 05:43:31.056 PDT | |
| ► Location | 39.2754 ; -119.0985 | |
| ► Depth | 7.64 km | |
| ► RMS | 0.1932 | |
| ► Gap | 087 | |
| ► Stations | 8 | |
| ► Defining Phases | 12 | |
| ► Associated Phases | 71 | |
| ► Type | Local | |
| ► Status | Reviewed | |
| ► Page Updated | 2026-04-19 at 06:00:35.223 | |
REVIEWED BY NSL STAFF
Event ID:915459
Origin ID:2364083
Algorithm: Ichinose (2003) Long Period, Regional-Distance Waves
Seismic Moment Tensor Solution
2026/04/19 (109) 12:43:32.00 39.2754 -119.0985 001
Depth = 3.0 (km)
Mw = 4.15
Mo = 2.11x10^22 (dyne x cm)
Percent Double Couple = 99 %
Percent CLVD = 1 %
no ISO calculated
Epsilon=-0.01
Percent Variance Reduction = 93.15 %
Total Fit = 42.82
Major Double Couple
strike dip rake
Nodal Plane 1: 59 84 5
Nodal Plane 2: 328 85 174
DEVIATORIC MOMENT TENSOR
Moment Tensor Elements: Spherical Coordinates
Mrr= 0.05 Mtt= -1.88 Mff= 1.83
Mrt= 0.03 Mrf= 0.29 Mtf= 0.94 EXP=22
Moment Tensor Elements: Cartesian Coordinates
-1.88 -0.94 0.03
-0.94 1.83 -0.29
0.03 -0.29 0.05
Eigenvalues:
T-axis eigenvalue= 2.10
N-axis eigenvalue= 0.01
P-axis eigenvalue= -2.11
Eigenvalues and eigenvectors of the Major Double Couple:
T-axis ev= 2.10 trend=283 plunge=8
N-axis ev= 0.00 trend=110 plunge=82
P-axis ev=-2.10 trend=14 plunge=1
Maximum Azmuithal Gap=146 Distance to Nearest Station= 69.8 (km)
Number of Stations (D=Displacement/V=Velocity) Used=9 (defining only)
WDEM.NN.D TBRD.NN.D ZPR.NN.D MPK.NN.D
CTC.NN.D KVN.NN.D RUB.NN.D WVA.NN.D
NV31.IM.D
---------- P ----
##------------ --------
#####------------------------
#########------------------------
###########------------------------
#############-----------------------##
-################-------------------#####
##################----------------#######
###################-------------##########
T ####################---------#############
######################----#################
#######################--###################
############################################
######################--####################
###################------##################
################----------#################
###########---------------###############
#######-------------------##############
##-------------------------############
--------------------------##########
--------------------------#######
-------------------------####
-----------------------##
-----------------
All Stations defining and nondefining:
Station.Net Def Distance Azi Bazi lo-f hi-f vmodel
(km) (deg) (deg) (Hz) (Hz)
WDEM.NN (D) Y 69.8 299 119 0.025 0.100 WDEM.NN.wus.glib
TBRD.NN (D) Y 72.5 261 80 0.025 0.100 TBRD.NN.wus.glib
ZPR.NN (D) Y 78.3 248 68 0.025 0.100 ZPR.NN.wus.glib
MPK.NN (D) Y 81.0 271 91 0.025 0.100 MPK.NN.wus.glib
CTC.NN (D) Y 89.1 266 85 0.025 0.100 CTC.NN.wus.glib
KVN.NN (D) Y 89.6 106 287 0.025 0.100 KVN.NN.wus.glib
RUB.NN (D) Y 94.0 255 74 0.025 0.100 RUB.NN.wus.glib
WVA.NN (D) Y 96.8 320 139 0.025 0.100 WVA.NN.wus.glib
NV31.IM (D) Y 124.2 139 319 0.025 0.100 NV31.IM.wus.glib
(V)-velocity (D)-Displacement
Author: www-data
Date: 2026/04/19 13:34:45 UTC
Date: 2026/04/19 06:34:45 PDT
mtinv Version 3.0.6 Thu Jan 11 16:00:25 PST 2018
index
