{
  "annotation_id": "a3acd48d-fa4c-425b-aabb-adbb6a8c2f7a",
  "date_created": "2026-03-02T18:01:14.973000Z",
  "date_modified": "2026-03-02T18:01:14.973000Z",
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  "record": {
    "abstract": "We address the problem of the response to a seismic wave of an urban site\nconsisting of $N$ non-identical, non-equispaced blocks overlying a soft layer\nunderlain by a hard substratum. The results of a theoretical analysis,\nappealing to a space-frequency mode-matching (MM) technique, are compared to\nthose obtained by a space-time finite element (FE) technique. The two methods\nare shown to give rise to the same prediction of the seismic response for N=1\nand N=2 blocks. The mechanism of the interaction between blocks and the ground,\nas well as that of the mutual interaction between blocks, are studied. It is\nshown that the presence of a small number of blocks modifies the seismic\ndisturbance in a manner which evokes qualitatively, but not quantitatively,\nwhat was observed during the 1985 Michoacan earthquake in Mexico City.\nDisturbances at a much greater level, induced by a large number of blocks (in\nfact, a periodic set) are studied in the companion paper.",
    "arxiv_id": "physics/0609228",
    "authors": [
      "Jean-Philippe Groby",
      "Armand Wirgin"
    ],
    "categories": [
      "physics.geo-ph"
    ],
    "doi": "10.1111/j.1365-246X.2007.03678.x",
    "title": "Seismic motion in urban sites consisting of blocks in welded contact   with a soft layer overlying a hard half space: I. Finite set of blocks",
    "url": "https://arxiv.org/abs/physics/0609228"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f54b047e-18fe-4007-866d-57b6dfb1ea2d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}