{
  "id": "2107.04944",
  "version": "v1",
  "published": "2021-07-11T02:33:14.000Z",
  "updated": "2021-07-11T02:33:14.000Z",
  "title": "Is Solar Minimum 24/25 Another Unusual One?",
  "authors": [
    "Huichao Li",
    "Xueshang Feng",
    "Fengsi Wei"
  ],
  "comment": "Accepted by APJL",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "The solar minimum 23/24 is considered to be unusual because it exhibits features that differ notably from those commonly seen in pervious minima. In this letter, we analyze the solar polar magnetic field, the potential-field solution of the solar corona, and the in-situ solar wind measurements to see whether the recent solar minimum 24/25 is another unusual one. While the dipolar configuration that are commonly seen during minimum 22/23 and earlier minima persist for about half a year after the absolute minimum of solar cycle 24, the corona has a morphology more complex than a simple dipole before the absolute minimum. The fast solar wind streams are less dominant than minimum 23/24. The IMF strength, density and mass flux that are historically low in the minimum 23/24 are regained during minimum 24/25, but still do not reach the minimum 22/23 level. From the analysis of this Letter, it seems that the minimum 24/25 is only partially unusual, and the recovery of the commonly minimum features may result from the enhancement of the polar field.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-07-11T02:33:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "solar minimum",
      "solar polar magnetic field",
      "in-situ solar wind measurements",
      "fast solar wind streams",
      "absolute minimum"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}