Patrik Johanssons hemsida

Old page/gamla sidan

Antal besökare sedan 21 maj 1997:
Number of visitors since 21 May 1997:[an error occurred while processing this directive]
(My ISP took away the script they provided on the old server when moving me to a new one. It will be a while before I fix another one.)
Now is:

Sat May 19 01:18:47 CEST 2012

Guestbook

My guestbook is on-line again. This time (somewhat) protected against spamming.

Hobby

I participate in The Great Internet Mersenne Prime Search. This is a distributed computing effort testing Mersenne numbers to see whether they are prime or not.

There is a web forum, www.mersenneforum.org where I sometimes participate under the forum name "patrik".

NEWMy best posts

Number of zeros in the (at the time of the post) largest known Mersenne prime
Digit missing in pi ASCII graphics

Nördiga postningar (title yet to be translated into English)

Importance of CR or CR/LF for GMP-ECM
Assembly programs for calling CPUID

Results from last ten days

Verified test results

Exponent,User name,Computer name,Residue,Date found
33258343,Patrik Johansson,nu,F2E73B88C45A82B9,2012-05-12 01:13
33258383,Patrik Johansson,nu,9E318BE02F764B50,2012-05-14 19:50
33258881,Patrik Johansson,mu,9C9E0EF333AF3716,2012-05-09 03:36
33259049,Patrik Johansson,kappa,EE786B780B8355A3,2012-05-09 16:17
33259321,Patrik Johansson,ws001,2AC0A71E797B48AD,2012-05-11 21:03
33259477,Patrik Johansson,ws001,E0513C7C535C9BEE,2012-05-15 12:24
33259483,Patrik Johansson,ws001,B85593176F2616AE,2012-05-11 23:54
33259619,Patrik Johansson,ws001,BD103E953FE6D4A4,2012-05-15 23:30
33259763,Patrik Johansson,theta,511590B849844E49,2012-05-14 06:32
33259949,Patrik Johansson,theta,2FC5F188AE2977CA,2012-05-12 05:58
33259969,Patrik Johansson,theta,355FB5B1208E144C,2012-05-11 05:14
33290503,Patrik Johansson,kappa,A1509353415F50A0,2012-05-13 05:16
33293369,Patrik Johansson,mu,8C482881DE2486C8,2012-05-18 03:16
33294301,Patrik Johansson,iota,BC631CFE63140A83,2012-05-17 16:37
33336619,Patrik Johansson,kappa,1BB05B4B3D3FD420,2012-05-13 04:34
33386789,Patrik Johansson,kappa,639854B181B7F3A0,2012-05-14 18:58
33433613,Patrik Johansson,iota,68AED7D693F369CB,2012-05-17 16:57
33539713,Patrik Johansson,iota,88E3BAC46FCFA230,2012-05-18 02:04
33722987,Patrik Johansson,iota,4BE3ADAB70415198,2012-05-17 21:17

Unverified test results

Exponent,User name,Computer name,Residue,Error code (if any),Date found
33302447,Patrik Johansson,kappa,D843A5B8BA5925__,,2012-05-17 05:45

Gravity measurement

A 7 min video showing one gravity measurement during field work in northern Sweden. (A conversation in Swedish might be heard.)

Another one:

Gravity measurement on ice (15 min, 234 MB):

Daily max and min of magnetic declination /kompassens missvisning/ at Uppsala Geophysical Observatory

The first plot shows the daily maximum and minimum value of the magnetic declination at Uppsala Geophysical Observatory, about 20 km west of central Uppsala. The median, and 10th and 90th percentile are also shown. E.g. on February 04, we see that the declination momentarily exceeds 5.7 degrees.
The second plot shows daily mean values (the blue curve), quiet days and monthly means (of quiet days). The quiet days are the five international quietest days, derived from the Kp index and published by GFZ Potsdam. The average of the field for these five days is then representing the monthly mean (the green line). When most of the quiet days occur in one end of the month, this approximation is less good (e.g. October 2010: 1, 2, 3, 4, 14).
(I describe how the plots are created here.)
Daily Magnetic Declination Plot

Wavelet transform of geomagnetic data

Link to image that shows the X component of Uppsala, instrument up2, for 01 Mar 2004 and a few hours of Mar 02. Time on horisontal axis, and scale on vertical axis.

Notes

about setting up different things with computers.

Web camera (off-line)
Postscript plot (~1MB) not updated

of difference between FGE magnetometer from DMI (named up2) and new LEMI 008 S magnetometer from Ukraine (named up3).

Space 1999 (Månbas Alpha)

My colleagues and I have been to Iceland. Pictures.

Photo: Per Wittmar.

Look what I found...

...when I was looking for aurora at the Auroral Large Imaging System (ALIS). Pay special attention to Kiruna.

Latest K indices

What's K indices?

These K indices have been computed at SGU using the FMI algorithm developed at the Finnish Meteorological Institute.

                 INDICES OF GEOMAGNETIC ACTIVITY


UPPSALA Observatory, Sweden           Scale-values of variometers

APRIL       2012                   X= 0.0016   Y= 0.0016 nT/digit

Range for K=9 :  600 nT

    GR      K- INDICES FOR THREE-HOUR INTERVAL

    DAY     1   2   3   4       5   6   7   8       SUM		 Ak   C(9)  DAY

     2      4   2   2   2       3   2   2   2        19		 10    3     2
     3      2   2   0   1       1   1   2   3        12		  6    1     3
     4      2   2   0   1       2   2   2   4        15		  8    2     4
     9      1   1   0   1       1   1   3   3        11		  6    1     9

    10      3   2   1   2       2   2   2   3        17		  8    2    10


K index Last Reached
9     2012 MARCH 15   15--18 UT
8     2011 SEPTEMBER 26   15--18 UT
7     2012 MARCH 09   15--18 UT
6     2012 MARCH 15   21--24 UT
5     2012 MARCH 28   00--03 UT
4     2012 APRIL 04   21--24 UT
3     2012 APRIL 10   21--24 UT
2     2012 APRIL 10   18--21 UT
1     2012 APRIL 10   06--09 UT
0     2012 APRIL 09   06--09 UT

C(9) index Last Reached
9     2005 MAY 30
8     2005 AUGUST 31
7     2012 MARCH 15
6     2012 MARCH 17
5     2012 MARCH 12
4     2012 MARCH 28
3     2012 APRIL 02
2     2012 APRIL 10
1     2012 APRIL 09
0     2012 MARCH 29

Planetary K index Kp

The Lovö observatory is one of the 13 observatories used to derive a global K index, the planetary Kp index. Read more about this at GFZ Potsdam. Here you can view the so called Musical diagrams of the Kp index.

Geomagnetic C9 Index (Daily Character)

Each day gets an index from 0 (quiet) to 9 (very disturbed), plotted in different colours. This plot has a width of 27 days (+6 overlapping days) to enhance repeated disturbances due to solar rotation.
As we can see, 2009 was particularly quiet.
Uppsala C9 Index plot

Magnetic declination

A map can be found here at the Geological Survey of Sweden.

Listen to modem

A 30 sec audio file (.au) of the modem calling Lovö geomagnetic observatory to get data. The Lovö observatory is now closed. Telephone links to Abisko and Uppsala are realized via ADSL.

Today's magnetic field

Read more about geomagnetism at the Geological Survey of Canada geomagnetism page page.

Abisko

uucp uuab2  (2/28-10:04:10,7162,7) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:45:00.00X00.Z --> uugm1!~/ab2/feb/28/07:45:00.00X00.Z (sil))
uucp uuab2  (2/28-10:04:11,7162,8) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:15:00.00Z00.Z --> uugm1!~/ab2/feb/28/07:15:00.00Z00.Z (sil))
uucp uuab2  (2/28-10:04:12,7162,9) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:30:00.00Y00.Z --> uugm1!~/ab2/feb/28/07:30:00.00Y00.Z (sil))
uucp uuab2  (2/28-10:04:13,7162,10) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:45:00.00Z00.Z --> uugm1!~/ab2/feb/28/07:45:00.00Z00.Z (sil))
uucp uuab2  (2/28-10:04:14,7162,11) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:00:00.00Z00.Z --> uugm1!~/ab2/feb/28/07:00:00.00Z00.Z (sil))
uucp uuab2  (2/28-10:04:15,7162,12) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:30:00.00X00.Z --> uugm1!~/ab2/feb/28/07:30:00.00X00.Z (sil))
uucp uuab2  (2/28-10:04:16,7162,13) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:00:00.00Y00.Z --> uugm1!~/ab2/feb/28/07:00:00.00Y00.Z (sil))
uucp uuab2  (2/28-10:04:17,7162,14) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:15:00.00Y00.Z --> uugm1!~/ab2/feb/28/07:15:00.00Y00.Z (sil))
uucp uuab2  (2/28-10:04:18,7162,15) REMOTE REQUESTED (uuab2!/data/net/feb/28/07:15:00.00X00.Z --> uugm1!~/ab2/feb/28/07:15:00.00X00.Z (sil))
uucp uuab2  (2/28-10:04:19,7162,16) OK (conversation complete - 19)

Abisko: operated by SGU, Sweden
(Lat:68.36N, Long:18.82E, Mag.Lat:65.90, Mag.Long:115.36)
(note: this figure is only for non-commercial monitoring purpose)

Lovö

Lovö geomagnetic observatory was closed and recordings discontinued on April 26, 2004.

Lycksele

Lycksele: jointly operated by IRF and SGU, Sweden
(Lat:64°36'43" N, Long:18°44'53" E)
(note: this figure is only for non-commercial monitoring purpose)

Uppsala

********** uuup1 ********** (uucico)
uucp uuup1  (2/28-10:06:31,8008,3) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:15:00.00X00.Z --> uugm1!~/up1/feb/28/07:15:00.00X00.Z (sil))
uucp uuup1  (2/28-10:06:32,8008,4) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:15:00.00Y00.Z --> uugm1!~/up1/feb/28/07:15:00.00Y00.Z (sil))
uucp uuup1  (2/28-10:06:33,8008,5) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:15:00.00Z00.Z --> uugm1!~/up1/feb/28/07:15:00.00Z00.Z (sil))
uucp uuup1  (2/28-10:06:34,8008,6) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:30:00.00X00.Z --> uugm1!~/up1/feb/28/07:30:00.00X00.Z (sil))
uucp uuup1  (2/28-10:06:35,8008,7) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:30:00.00Y00.Z --> uugm1!~/up1/feb/28/07:30:00.00Y00.Z (sil))
uucp uuup1  (2/28-10:06:36,8008,8) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:30:00.00Z00.Z --> uugm1!~/up1/feb/28/07:30:00.00Z00.Z (sil))
uucp uuup1  (2/28-10:06:37,8008,9) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:45:00.00X00.Z --> uugm1!~/up1/feb/28/07:45:00.00X00.Z (sil))
uucp uuup1  (2/28-10:06:38,8008,10) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:45:00.00Y00.Z --> uugm1!~/up1/feb/28/07:45:00.00Y00.Z (sil))
uucp uuup1  (2/28-10:06:39,8008,11) REMOTE REQUESTED (uuup1!/data/net/feb/28/07:45:00.00Z00.Z --> uugm1!~/up1/feb/28/07:45:00.00Z00.Z (sil))
uucp uuup1  (2/28-10:06:40,8008,12) OK (conversation complete - 18)
********** uuup2 ********** (uucico)
uucp uuup2  (2/28-10:07:50,8033,8) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:15:00.00X00.Z --> uugm1!~/up2/feb/28/07:15:00.00X00.Z (sil))
uucp uuup2  (2/28-10:07:51,8033,9) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:15:00.00Y00.Z --> uugm1!~/up2/feb/28/07:15:00.00Y00.Z (sil))
uucp uuup2  (2/28-10:07:52,8033,10) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:15:00.00Z00.Z --> uugm1!~/up2/feb/28/07:15:00.00Z00.Z (sil))
uucp uuup2  (2/28-10:07:53,8033,11) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:30:00.00X00.Z --> uugm1!~/up2/feb/28/07:30:00.00X00.Z (sil))
uucp uuup2  (2/28-10:07:54,8033,12) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:30:00.00Y00.Z --> uugm1!~/up2/feb/28/07:30:00.00Y00.Z (sil))
uucp uuup2  (2/28-10:07:55,8033,13) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:30:00.00Z00.Z --> uugm1!~/up2/feb/28/07:30:00.00Z00.Z (sil))
uucp uuup2  (2/28-10:07:56,8033,14) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:45:00.00X00.Z --> uugm1!~/up2/feb/28/07:45:00.00X00.Z (sil))
uucp uuup2  (2/28-10:07:57,8033,15) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:45:00.00Y00.Z --> uugm1!~/up2/feb/28/07:45:00.00Y00.Z (sil))
uucp uuup2  (2/28-10:07:58,8033,16) REMOTE REQUESTED (uuup2!/data/net/feb/28/07:45:00.00Z00.Z --> uugm1!~/up2/feb/28/07:45:00.00Z00.Z (sil))
uucp uuup2  (2/28-10:07:59,8033,17) OK (conversation complete - 20)

Uppsala: operated by SGU, Sweden
(Lat:59.90N, Long:17.35E)
(note: this figure is only for non-commercial monitoring purpose)

Power status

-rw-r--r--  1 wu001179  foretag  537 Mar 27 09:46 ../powfail.txt
Mail messages about "Abnormal":
Mail messages about "Power Failure":
Mail messages about "shutdown":
Mail messages about "Abnormal":
Mail messages about "Power Failure":
Mail messages about "shutdown":
Mail messages about "Abnormal":
Mail messages about "Power Failure":
Mail messages about "shutdown":
Mail messages about "Abnormal":
Mail messages about "Power Failure":
Mail messages about "shutdown":
Mail messages about "Abnormal":
Mail messages about "Power Failure":
Mail messages about "shutdown":
Mail messages about "Abnormal":

Magnetic field plots at WDC-C2 in Kyoto

Today
Yesterday

Hale-Bopp

I still include a link to the ephemeris for Hale-Bopp, although it is out of date.

Links

I haven't finished the list of interesting links yet. You may look at my bookmarks instead.

Previous change 25 December 2008/Tidigare ändrad 25 december 2008. (Fixed broken links.)
Prevoius change 28 May 2009/Tidigare ändrad 28 maj 2009. (Added

.)
Previous change 18 December 2009/Tidigare ändrad 18 december 2009. (Added linked image of up2 temp. and rel. humidity.)
Previous change 25 December 2009/Tidigare ändrad 25 december 2009. (Replaced inlined image of wavelet plot with a link. Added linked image of geomagnetic C9 index for UPS.)
Previous change 11 February 2010/Tidigare ändrad 11 februari 2010. (Added inlined image of max and min declination for UPS.)
Previous change 4 July 2010/Tidigare ändrad 4 juli 2010. (Added mean value plot of magneic declination for UPS.)
Previous change 11 July 2010/Tidigare ändrad 11 juli 2010. (Added link to notes.)
Previous change 24 April 2011/Tidigare ändrad 23 april 2011. (Added a few lines of explaining text.)
Previous change 19 September 2011/Tidigare ändrad 19 september 2011. (Added new video of gravity measurement.)
Previous change 29 September 2011/Tidigare ändrad 29 september 2011. (Added another video of a gravity measurement.)
Previous change 16 October 2011/Tidigare ändrad 16 oktober 2011. (Added links to my best posts in mersenneforum.)
Last change 24 February 2012/Senast ändrad 24 februari 2012. (Added a video of a gravity measurement on ice.)