diff --git a/eoxmagmod/eoxmagmod/data/__init__.py b/eoxmagmod/eoxmagmod/data/__init__.py
index 77de844..c45647e 100644
--- a/eoxmagmod/eoxmagmod/data/__init__.py
+++ b/eoxmagmod/eoxmagmod/data/__init__.py
@@ -55,6 +55,7 @@
 IGRF14 = join(_DIRNAME, 'IGRF14.shc')
 IGRF_LATEST = IGRF14
 IGRF_LATEST_VERSION = "14"
+IGRF_LATEST_SOURCE = "SW_OPER_AUX_IGR_2__19000101T000000_20291231T235959_0104"
 SIFM = join(_DIRNAME, 'SIFM.shc')
 LCS1 = join(_DIRNAME, 'LCS-1.shc')
 MF7 = join(_DIRNAME, 'MF7.shc')