On Day 4 (August 27, 1999), the reconnaissance team stopped on the north shore of Sapanca lake, and re-visited Adapazari.

Ground cracks were noticeable from the highway north of Sapanca lake. These ground cracks were attributed to the reactivation of large existing landslides after the earthquake (N40^o44.027’, E30^o13.275’, 8/27/99, 11:24:52).

Assumed position of existing landslide north of Sapanca lake. The geological map represents a recent quaternary deposit which could be sliding toward Sapanca lake (N40^o44.027’, E30^o13.275’, 8/27/99, 11:24:52).

Some streets of Adapazari were completely devastated by the earthquake (N40^o46.318’, E30^o24.112’, 8/27/99, 12:23:25).

The Ziraat bank building in Adapazari is one of the few buildings founded on piles. There were no apparent signs of damage to this building (N40^o46.6’, E30^o24.062’, 8/27/99, 12:37:58).

In Adapazari, the building settled and the sidewalk bulged and split longitudinally (N40^o46.661’, E30^o24.163’, 8/27/99, 12:46:27).

A deposit of ejected sand was observed in front of this building which settled into the ground. This was not systematically observed for all settled buildings (Adapazari, N40^o46.612’, E30^o24.257’, 8/27/99, 12:54:13).

The column punched through the floor of the building which settled (Adapazari, N40^o46.614’, E30^o24.287’, 8/27/99, 13:02:07).

In the garage at the first floor of an apartment building, silty sand had littered the concrete slab. Water was reported to have flooded the garage after the earthquake (N40^o46.651’, E30^o24.598’, 8/27/99, 13:09:48).

The building settled due to liquefaction, and the connection to the staircase was sheared (Adapazari, N40^o46.499’, E30^o24.646’, 8/27/99, 13:47:19).

The building settled due to liquefaction, and the connection to the staircase was sheared (Adapazari, N40^o46.561’, E30^o24.626’, 8/27/99, 14:19:57).

The staircase of the building was sheared as the building settled due to liquefaction (Adapazari, N40^o46.561’, E30^o24.626’, 8/27/99, 14:19:57).

A small length of the saturated bank of the river spread laterally (N40^o47.795’, E30^o26.184’, 8/27/99, 16:41:35).

The office building in the center leaned sideways due to differential settlement (N40^o46.719’, E30^o24.215’, 8/27/99, 17:07:46).