Not quite precognition, but various experts are claiming August 18 (ie tomorrow - as I type) is some earthquake activity, see:
      www.earthfiles.com/news.php
Note that we've seen big quakes in Peru and in Indonesia this week, are there some more predicted?

FYI... on that page they write:

So far, not many individual crop pictures have shown both 'date' and 'event nature' in the same field, except for:
- Wayland's Smithy 2005 >>> date = August 16-19, 2007 >>> event nature = Mayan symbol for earthquake.
- Wayland's Smithy 2006 >>> date = mid-August 2007 >>> event nature = astronomical rays from space.
- East Field 2007 >>> date = August 18, 2007 >>> event nature = disappearance of the Moon (i.e. cloud cover). East Field was documented on camera, as forming immediately after a bright flash of light above the field.
The most recent 2007 pictures have shown either one or the other, but not both:
- Sugar Hill of July 31 >>> date = 18 days left
- Pewsey of August 4 >>> date = 32-34% phase in the next lunar cycle (i.e. August 18-19)
- Westwoods of August 9 >>> event nature = slippage of Earth's gravity well (i.e. tectonic plates)
- Stanton of August 12 >>> date = 6 days left