"Marsquake" meaning in English

{
  "forms": [
    {
      "form": "Marsquakes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Marsquake (plural Marsquakes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "marsquake"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1988, Vincent DiPietro, Gregory Molenaar, John Brandenburg, Unusual Mars Surface Features, page 45",
          "text": "Some of the scientific explanations that promote natural formation include wind faceting and shifting of subterrain plates (Marsquakes ) .",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative letter-case form of marsquake"
      ],
      "id": "en-Marsquake-en-noun-syNaeEwa",
      "links": [
        [
          "marsquake",
          "marsquake#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "Marsquake"
}

{
  "forms": [
    {
      "form": "Marsquakes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Marsquake (plural Marsquakes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "marsquake"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1988, Vincent DiPietro, Gregory Molenaar, John Brandenburg, Unusual Mars Surface Features, page 45",
          "text": "Some of the scientific explanations that promote natural formation include wind faceting and shifting of subterrain plates (Marsquakes ) .",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative letter-case form of marsquake"
      ],
      "links": [
        [
          "marsquake",
          "marsquake#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "Marsquake"
}