Seismic data visualization broken

[micmitch]

No image displayed with reference to gpg/content/seismic/raw_refraction_data.html on the Seismic/Data page.

[micmitch]

Checked image paths in html. At first glace they appear to be correct.

[micmitch]

Under seismic/processing/Irregular Surfaces and the Plus-Minus Method all of the figures referenced in the text are missing.