Recent Flare List (2021-)

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List of EOVSA Flares with Spectrogram Data

Pre-2021 Selected Events

Date Time (UT) GOES Class Spectrogram STIX Coverage
2019-04-15 19:31 B3.3
EOVSA 20190415 B3flare.png
plot data
NA

April 2021

Date Time (UT) GOES Class Spectrogram STIX Coverage
2021-04-17 16:46 B9.0
EOVSA 20210417 B9flare.png
plot data
Yes
2021-04-19 23:36 M1.0
EOVSA 20210419 M1flare.png
plot data
No

May 2021

Date Time (UT) GOES Class Spectrogram STIX Coverage
2021-05-05 22:30 B5.0
EOVSA 20210505 B1flare.png
plot data
Yes
2021-05-07 19:00 M4.0
EOVSA 20210507 M4flare.png
plot data
Yes
2021-05-08 18:30 C9.0
EOVSA 20210508 C9flare.png
plot data
Yes
2021-05-09 13:55 C4.0
EOVSA 20210509 C4flare.png
plot data
Yes
2021-05-17 19:05 B5.0
EOVSA 20210517 B5flare.png
plot data
Yes
2021-05-21 19:25 C5.0
EOVSA 20210521 C5flare.png
plot data
Yes
2021-05-22 16:10 C1.0
EOVSA 20210522 C1flare.png
plot data
Yes
2021-05-22 17:10 M1.0
EOVSA20210522 M1flare.png
plot data
Yes
2021-05-22 21:30 M1.4
EOVSA 20210522 M1.4flare.png
plot data
Yes
2021-05-22 23:11 C7.0
EOVSA 20210522 C7flare.png
plot data
Yes
2021-05-23 17:00 C2.0
EOVSA 20210523 C2flare.png
plot data
Yes
2021-05-27 22:00 C1.0
EOVSA 20210527 C1flare.png
plot data
No
2021-05-27 23:10 C7.0
EOVSA 20210527 C7flare.png
plot data
No
2021-05-28 22:30 C9.0
EOVSA 20210528 C9flare.png
plot data
No

July 2021

Date Time (UT) GOES Class Spectrogram STIX Coverage
2021-07-03 14:27 X1.5
EOVSA 20210703 X1flare.png
plot data
No
2021-07-06 19:15 C1.1
EOVSA 20210706 flare1.png
plot data
No
2021-07-06 20:58 C1.2
EOVSA 20210706 flare2.png
plot data
No
2021-07-06 21:49 C1.1
EOVSA 20210706 flare3.png
plot data
No
2021-07-09 17:20 C4.7
EOVSA 20210709 C4flare.png
plot data
No

August 2021

Date Time (UT) GOES Class Spectrogram STIX Coverage
2021-08-20 15:55 C3.0
EOVSA 20210820 C3flare.png
plot data
Yes
2021-08-20 21:45 C1.4
EOVSA 20210820 C1.4flare.png
plot data
Yes
2021-08-21 18:41 B3.9
EOVSA 20210821 B3.9flare.png
plot data
Yes
2021-08-21 21:57 B3.9
EOVSA 20210821 B3.9flare2.png
plot data
Yes
2021-08-21 22:29 B4.7
EOVSA 20210821 B4.7flare.png
plot data
Yes
2021-08-26 18:12 C3.0
EOVSA 20210826 C3flare.png
plot data
Yes
2021-08-26 23:20 C3.9
EOVSA 20210826 C3.9flare.png
plot data
Yes
2021-08-27 21:00 C7.3
EOVSA 20210827 C7flare.png
plot data
Yes
2021-08-29 17:21 C2.9
EOVSA 20210829 C3flare.png
plot data
Yes (occulted?)
2021-08-30 16:12 C2.0
EOVSA 20210830 C2flare.png
plot data
Yes (occulted)
2021-08-30 18:23 B7.0
EOVSA 20210830 B7flare.png
plot data
Yes (occulted)
2021-08-30 20:47 B8.0
EOVSA 20210830 B8flare.png
plot data
Yes (occulted)
2021-08-31 14:48 B2.5
EOVSA 20210831 Bflares.png
plot data
No
2021-08-31 19:08 B7.1
EOVSA 20210831 B7flare.png
plot data
No


September 2021

Date Time (UT) GOES Class Spectrogram STIX Coverage
2021-09-08 17:24 C8.3
EOVSA 20210908 C8flare.png
plot data
Yes
2021-09-20 all day low B
EOVSA 20210920 flares0.png
plot data
EOVSA 20210920 flares1.png
plot data
EOVSA 20210920 flares2.png
plot data
Yes
2021-09-21 20:24 B5.1
EOVSA 20210921 Bflare.png
plot data
Yes
2021-09-22 20:12 C1.1
EOVSA 20210922 Cflare.png
plot data
Yes
2021-09-23 15:24 M1.9
EOVSA 20210923 M2flare.png
plot data
Yes
2021-09-23 20:40 C1.0
EOVSA 20210923 Cflare.png
plot data
Yes
2021-09-24 16:45 none?
EOVSA 20210924 Bflare.png
plot data
Yes
2021-09-24 21:16 B2.0
EOVSA 20210924 Bflares.png
plot data
Yes
2021-09-25 19:15 C1.7
EOVSA 20210925 Cflare.png
plot data
Yes

October 2021

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2021-10-11 19:21 B2
EOVSA 20211011 Bflare.png
plot data
Yes
2021-10-12 15:57 B6
EOVSA 20211012 Bflare.png
plot data
Yes
2021-10-28 15:26 X1
EOVSA 20211028 Xflare.png
plot data
Yes Evidence for low band spike emission
EOVSA 20211028 spikes.png
(~15:28:30 UT)

November 2021

Date Time (UT) GOES Class Spectrogram STIX Coverage
2021-11-01 20:43 C2.1
EOVSA 20211101 C2flare.png
plot data
Yes
2021-11-01 21:11 C4.0
EOVSA 20211101 C4flare.png
plot data
Yes
2021-11-01 23:39 C4.5
EOVSA 20211101 C4.5flare.png
plot data
Yes
2021-11-03 21:14 C5.2
EOVSA 20211103 C5flare.png
plot data
Yes

December 2021

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2021-12-12 21:13 C1.2
EOVSA 20211212 Cflare.png
plot data
Yes
2021-12-14 20:33 C1.6
EOVSA 20211214 Cflare.png
plot data
Yes
2021-12-31 19:42 C8.1
EOVSA 20211232 C8flare.png
plot data
Yes Surprisingly weak in microwaves considering it is a C8 in soft X-rays.

January 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-01-18 17:38 M1.2
EOVSA 20220118 Mflare.png
plot data
Yes
2022-01-28 19:31 C2.8
EOVSA 20220128 C2flare.png
plot data
Yes
2022-01-28 20:10-20:50 B2-B6
EOVSA 20220128 Bflares.png
plot data
Yes
2022-01-29 23:00 M1
EOVSA 20220129 M1flare.png
plot data
Yes EOVSA took fast-mode data of this event
EOVSA 20220129 fast mode.png
Each row is 2-min of data at 20 ms cadence

February 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage
2022-02-03 20:42 C1.3
EOVSA 20220203 C1flare.png
plot data
Yes
2022-02-05 17:00 C2.1
EOVSA 20220205 C2flare.png
plot data
Yes
2022-02-08 21:40 C5.1
EOVSA 20220208 C5flare.png
plot data
Yes

March 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-03-30 17:30 X1.4
EOVSA 20220330 Xflare.png
plot data
Yes
EOVSA 20220330 Xflare osc.png
Interesting oscillations
2022-03-31 18:28 M9.7
EOVSA 20220331 M9flare.png
plot data
Yes
2022-03-31 19:32 C5
EOVSA 20220331 Cflare.png
plot data
Yes

April 2022

Although EOVSA observed many interesting events in April, the cooled receiver on the 27-m antenna, essential for phase calibration, was not working from about April 1 - May 7, 2022. The cause of the long outage was that the manlift needed to repair the receiver had a flat tire that required a long leadtime to replace. Any events seen during this period are available in total power only--no imaging is possible.

May 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-05-10 13:55 X1.5
EOVSA 20220510 Xflare.png
plot data
No
2022-05-11 18:35 M2.6
EOVSA 20220511 M2flare.png
plot data
Yes
2022-05-15 00:01 M2.3
EOVSA 20220515 M2flare.png
plot data
No
2022-05-17 19:33 C2.0
EOVSA 20220517 C2flare.png
plot data
No
2022-05-18 22:00 M1.1
EOVSA 20220518 M1flare.png
plot data
No
2022-05-24 22:30 C5.1
EOVSA 20220524 C2flare.png
plot data
No
2022-05-25 18:17 M1.3
EOVSA 20220525 M1flare.png
plot data
No Two-ribbon flare from spotless region

July 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-07-08 20:23 M2.6
EOVSA 20220708 Mflare.png
plot data
No
2022-07-14 21:45 M2.9
EOVSA 20220714 Mflare.png
plot data
No
2022-07-15 23:09 C2.9
EOVSA 20220715 C3flare.png
plot data
No
2022-07-16 21:17 C1.1
EOVSA 20220716 C1flare.png
plot data
No
2022-07-17 21:37 C4.8
EOVSA 20220717 C4flare.png
plot data
No
2022-07-31 22:50 C9.3
EOVSA 20220731 M1flare.png
plot data
No

August 2022

Note: For much of August the array was down due to a planned power outage to install some new power equipment. The event on 2022 Aug. 30 was observed while the array was not yet tuned for delays.

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-08-30 17:58 M1.2
EOVSA 20220830 M2flare.png
plot data
No The amplitudes are not corrected for bad delays

link to total power plot with ~ correct amplitudes

September 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-09-12 23:45 M1.8
EOVSA 20220912 M2flare.png
plot data
No
2022-09-16 15:51 M6.7
EOVSA 20220916 M6flare.png
plot data
Yes
2022-09-17 20:43 M2.6
EOVSA 20220917 M2flare.png
plot data
Yes Weak, occulted event
2022-09-18 22:11 C3.0
EOVSA 20220918 C3flare.png
plot data
Yes
2022-09-23 18:02 M1.7
EOVSA 20220923 M2flare.png
plot data
Yes
2022-09-30 16:24 M3.0
EOVSA 20220930 M3flare.png
plot data
No
2022-09-30 22:41 C3.0
EOVSA 20220930 C3flare.png
plot data
No Nice on-disk jet-like event

October 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-10-01 18:02 C3
EOVSA 20221001 C3flare.png
plot data
No
2022-10-01 18:49 C2
EOVSA 20221001 C2flare.png
plot data
No
2022-10-01 20:09 M5.8
EOVSA 20221001 M5flare.png
plot data
No
2022-10-02 20:23 X1.1
EOVSA 20221002 X1flare.png
plot data
No Very strong radio event >1700 sfu
2022-10-03 20:21 M2
EOVSA 20221003 M2flare.png
plot data
No
2022-10-10 15:42 C5
EOVSA 20221010 C5flare.png
plot data
No
2022-10-10 16:12 M2
EOVSA 20221010 M2flare.png
plot data
No
2022-10-10 23:19 C3
EOVSA 20221010 C3flare.png
plot data
No Tiny circular-ribbon flare
2022-10-11 16:35 C3.6
EOVSA 20221011 Cflare.png
plot data
No
2022-10-11 18:17 C6.1
EOVSA 20221011 C6flare.png
plot data
No
2022-10-12 16:28 C4.7
EOVSA 20221012 C4flare.png
plot data
No
2022-10-13 00:10 M1.5
EOVSA 20221013 M1flare.png
plot data
No

November 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-11-12 18:02 C6.5
EOVSA 20221112 Cflare.png
plot data
Yes Unusually fast (1-s) rise time

December 2022

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2022-12-09 22:42 C5.0
EOVSA 20221209 Cflare.png
plot data
Yes Very spikey, yet strong (and brief) in SXR
2022-12-13 19:48 C1.0
EOVSA 20221213 C1flare.png
plot data
Yes
2022-12-13 23:17 C3.0
EOVSA 20221213 C3flare.png
plot data
Yes
2022-12-14 19:09 C3.0
EOVSA 20221214 C3flare.png
plot data
Yes
2022-12-14 19:33 C5.0
EOVSA 20221214 C5flare.png
plot data
Yes
2022-12-14 20:55 M2.0
EOVSA 20221214 M2flare.png
plot data
Yes
2022-12-14 22:06 M3.0
EOVSA 20221214 M3flare.png
plot data
Yes
2022-12-16 19:06 C9.0
EOVSA 20221216 C9flare.png
plot data
Yes VLA C-band data were obtained for this flare
2022-12-17 19:46 M1.0
EOVSA 20221217 M1flare.png
plot data
Yes Nice east-limb filament eruption
2022-12-21 20:45 C5.0
EOVSA 20221221 C5flare.png
plot data
Yes
2022-12-21 22:12 C6.9
EOVSA 20221221 C6flare.png
plot data
Yes
2022-12-22 22:27 B7.8
EOVSA 20221222 burst.png
plot data
Yes Intense decimetric emission with weak GS
2022-12-27 16:24 M1.2
EOVSA 20221227 M1flare.png
plot data
Yes
2022-12-27 20:36 C4.5
EOVSA 20221227 C4flare.png
plot data
Yes
2022-12-29 18:18 M2.4
EOVSA 20221229 M2flare.png
plot data
Yes A nice, long-duration limb flare
2022-12-29 18:18 M2.4
EOVSA 20221229 M2flare ld.png
plot data
Yes Same flare as above, showing long decay
2022-12-30 19:09 C4.0
EOVSA 20221230 C4flare.png
plot data
Yes This and the next flare could be considered one event
2022-12-30 19:35 M3.7
EOVSA 20221230 M3flare.png
plot data
Yes Really nice on-disk event (flux rope)

January 2023

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2023-01-09 18:46 X2.0
EOVSA 20230109 Xflare.png
plot data
Yes
2023-01-10 22:47 X1.0
EOVSA 20230110 Xflare.png
plot data
Yes

February 2023

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2023-02-11 15:50 X1.2
EOVSA 20230211 Xflare.png
plot data
Yes
2023-02-17 20:03 X2.3
EOVSA 20230217 X2flare.png
plot data
Yes
2023-02-19 19:28 C4.0
EOVSA 20230219 Cflare.png
plot data
Yes
2023-02-21 20:12 M5.1
EOVSA 20230221 M5flare.png
plot data
Yes
2023-02-23 18:20 C8.9
EOVSA 20230223 C8flare.png
plot data
No
2023-02-23 23:12 C6.2
EOVSA 20230223 C6flare.png
plot data
Yes
2023-02-24 20:20 M3.7
EOVSA 20230224 Mflare.png
plot data
Yes
2023-02-25 19:30 M5.9
EOVSA 20230225 Mflare.png
plot data
Yes
2023-02-26 19:17 C2.8
EOVSA 20230226 Cflare.png
plot data
Yes

March 2023

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2023-03-05 21:35 M5
EOVSA 20230305 Mflare.png
plot data
Yes
2023-03-08 22:42 M1.4
EOVSA 20230308 Mflare.png
plot data
Yes
2023-03-18 20:51 B8.6
EOVSA 20230318 LWAflare.png
plot data
Yes OVRO-LWA data for this event

April 2023

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2023-04-07 20:37 C2.6
EOVSA 20230407 C2flare.png
plot data
Yes
2023-04-07 23:34 C5.8
EOVSA 20230407 C5flare.png
plot data
Yes
2023-04-11 22:38 C5.9
EOVSA 20230411 Cflare.png
plot data
Yes
2023-04-14 23:26 M1.5
EOVSA 20230414 Mflare.png
plot data
Yes
2023-04-18 19:12 C1.9
EOVSA 20230418 Cflare.png
plot data
Yes
2023-04-21 17:57 M1.8
EOVSA 20230421 Mflare.png
plot data
Yes
2023-04-27 01:00 C3.0
EOVSA 20230427 Cflare.png
plot data
Yes
2023-04-29 23:02 C3.2
EOVSA 20230429 Cflare.png
plot data
Yes
2023-04-30 20:35 M2.1
EOVSA 20230430 Mflare.png
plot data
Yes

May 2023

Date Time (UT) GOES Class Spectrogram STIX Coverage Comment
2023-05-01 21:46 C3.4
EOVSA 20230501 Cflare.png
plot data
Yes
2023-05-03 20:53 C4.1
EOVSA 20230503 Cflare.png
plot data
No

Python code to read plotdata file

from __future__ import print_function
def rd_datfile(file):
    ''' Read EOVSA binary spectrogram file and return a dictionary with times 
        in Julian Date, frequencies in GHz, and cross-power data in sfu.
        
        Return Keys:
          'time'     Numpy array of nt times in JD format
          'fghz'     Numpy array of nf frequencies in GHz
          'data'     Numpy array of size [nf, nt] containing cross-power data
          
        Returns empty dictionary ({}) if file size is not compatible with inferred dimensions
    '''
    import struct
    import numpy as np
    def dims(file):
        # Determine time and frequency dimensions (assumes the file has fewer than 10000 times)
        f = open(file,'rb')
        tmp = f.read(83608)  # max 10000 times and 451 frequencies
        f.close()
        nbytes = len(tmp)
        tdat = np.array(struct.unpack(str(int(nbytes/8))+'d',tmp[:nbytes]))
        nt = np.where(tdat < 2400000.)[0]
        nf = np.where(np.logical_or(tdat[nt[0]:] > 18, tdat[nt[0]:] < 1))[0]
        return nt[0], nf[0]
    nt, nf = dims(file)
    f = open(file,'rb')
    tmp = f.read(nt*8)
    times = struct.unpack(str(nt)+'d',tmp)
    tmp = f.read(nf*8)
    fghz = struct.unpack(str(nf)+'d',tmp)
    tmp = f.read()
    f.close()
    if len(tmp) != nf*nt*4:
        print('File size is incorrect for nt=',nt,'and nf=',nf)
        return {}
    data = np.array(struct.unpack(str(nt*nf)+'f',tmp)).reshape(nf,nt)
    return {'time':times, 'fghz':fghz, 'data':data}

IDL code to read plotdata file

function rd_datfile,file
    ; Read EOVSA binary spectrogram file and return a structure with times 
    ; in Julian Date, frequencies in GHz, and cross-power data in sfu.
    ;    
    ; Return tags:
    ;      'time'     Array of nt times in JD format
    ;      'fghz'     Array of nf frequencies in GHz
    ;      'data'     Array of size [nf, nt] containing cross-power data
    ;
    ;    Returns empty dictionary ({}) if file size is not compatible with inferred dimensions
    openr,/get_lun,lun,file
    tmp = dblarr(10451)
    readu,lun,tmp
    free_lun,lun
    nt = (where(tmp lt 2400000.))[0]
    nf = (where(tmp[nt[0]:*] gt 18 or tmp[nt[0]:*] lt 1))[0]
    times = dblarr(nt)
    fghz = dblarr(nf)
    data = fltarr(nt, nf)
    openr,/get_lun,lun,file
    readu,lun,times
    readu,lun,fghz
    readu,lun,data
    free_lun,lun
    data = create_struct('time',times,'fghz',fghz,'data',transpose(data))
    return, data
    end