"slow earthquake" meaning in English

{
  "forms": [
    {
      "form": "slow earthquakes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "slow earthquake (plural slow earthquakes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Seismology",
          "orig": "en:Seismology",
          "parents": [
            "Geology",
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A discontinuous earthquake-like event that releases energy over a period of hours to months, rather than the seconds to minutes characteristic of a typical earthquake."
      ],
      "id": "en-slow_earthquake-en-noun-NXz3A3mq",
      "links": [
        [
          "seismology",
          "seismology"
        ],
        [
          "discontinuous",
          "discontinuous"
        ],
        [
          "energy",
          "energy"
        ]
      ],
      "raw_glosses": [
        "(seismology) A discontinuous earthquake-like event that releases energy over a period of hours to months, rather than the seconds to minutes characteristic of a typical earthquake."
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences",
        "seismology"
      ],
      "wikipedia": [
        "slow earthquake"
      ]
    }
  ],
  "word": "slow earthquake"
}

{
  "forms": [
    {
      "form": "slow earthquakes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "slow earthquake (plural slow earthquakes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Seismology"
      ],
      "glosses": [
        "A discontinuous earthquake-like event that releases energy over a period of hours to months, rather than the seconds to minutes characteristic of a typical earthquake."
      ],
      "links": [
        [
          "seismology",
          "seismology"
        ],
        [
          "discontinuous",
          "discontinuous"
        ],
        [
          "energy",
          "energy"
        ]
      ],
      "raw_glosses": [
        "(seismology) A discontinuous earthquake-like event that releases energy over a period of hours to months, rather than the seconds to minutes characteristic of a typical earthquake."
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences",
        "seismology"
      ],
      "wikipedia": [
        "slow earthquake"
      ]
    }
  ],
  "word": "slow earthquake"
}