{
  "id": "1405.5912",
  "version": "v2",
  "published": "2014-05-22T21:32:15.000Z",
  "updated": "2014-09-10T07:49:57.000Z",
  "title": "Energy Release and Initiation of Sunquake in C-class Flare",
  "authors": [
    "I. N. Sharykin",
    "A. G. Kosovichev",
    "I. V. Zimovets"
  ],
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present analysis of C7.0 solar flare of Febrary 17, 2013, revealing a strong helioseismic response (sunquake) caused by a very compact impact in the photosphere. This is the weakest known C-class flare generating a sunquake event. To investigate possible mechanisms of this event, and to understand the role of accelerated charged particles and photospheric electric currents, we use data from three space observatories: Ramaty High Energy Solar Spectroscopic Imager (RHESSI), Solar Dynamics Observatory (SDO) and Geostationary Operational Environmental Satellite (GOES). We find that the photospheric flare impact does not spatially correspond to the strongest HXR emission source, but both of these events are parts of the same energy release. Our analysis reveals a close association of the flare energy release with a rapid increase of the electric currents, and suggests that the sunquake initiation is unlikely to be explained by the impact of high-energy electrons but may be associated with a rapid current dissipation or a localized impulsive Lorentz force.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-05-22T21:32:15.000Z",
      "abstract": "We present analysis of a C-class solar flare of Febrary 17, 2013, revealing a strong helioseismic response caused by a very compact impact in the photosphere. This is the first detection of sunquake in C-class flares. To investigate possible mechanisms of generation of this sunquake, and to understand the role of accelerated charged particles and photospheric electric currents, we use data from three space observatories: Ramaty High Energy Solar Spectroscopic Imager (RHESSI), Solar Dynamics Observatory (SDO) and Geostationary Operational Environmental Satellite (GOES). We find that the sunquake impulse does not spatially correspond to the HXR emission source, but both of these events are parts of the same energy release. Our analysis reveals a close association of the flare energy release with a rapid increase of the electric currents, and suggests that the sunquake initiation can be explained by a rapid current dissipation or by a localized impulsive Lorentz force.",
      "comment": null,
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2014-09-10T07:49:57.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "c-class flare",
      "high energy solar spectroscopic imager",
      "initiation",
      "ramaty high energy solar spectroscopic",
      "geostationary operational environmental satellite"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/807/1/102",
      "journal": "The Astrophysical Journal",
      "year": 2015,
      "month": "Jul",
      "volume": 807,
      "number": 1,
      "pages": 102
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015ApJ...807..102S"
    }
  }
}