2nd China-Europe Solar Physics Meeting (CESPM 2019)

Written by Jaša Čalogović Monday, 26 November 2018 18:26

2nd China-Europe Solar Physics Meeting (CESPM) 2019Following the success of the first meeting held in China (CESPM 2017, Kunming, Yunnan) the 2nd China-Europe Solar Physics Meeting (CESPM 2019) will be organized from 6 to 10 May 2019 in Hvar, Croatia. Main aim of this meeting is to strengthen the collaboration between European and Chinese scientists, in particular among young scientists. The scientific sessions included the following topics: 1) Solar Interior, Dynamo and the Solar Cycle; 2) Heating and Coupling of the Solar Atmosphere layers; 3) Fundamental Plasma Processes: Magnetic Reconnection, Waves, Emission, Particle Acceleration; 4) Manifestations and Triggering of Solar Flares and Coronal Mass Ejections; 5) Solar-Terrestrial Relations, Solar Wind, Space Weather and Space Climate. Abstract submission and registration are now open.

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Austro-Croatian Workshop at Zagreb Observatory

Written by Jaša Čalogović Tuesday, 20 November 2018 16:30

Austro-Croatian Workshop at Zagreb ObservatoryFrom 6 to 8 December 2018 a small workshop will be held at Zagreb Observatory in the scope of the austrian-croatian bilateral scientific project ”Development of the Drag-Based-Ensemble Model for studies on the propagation of solar storms (DBEM)” between Hvar Observatory (University of Zagreb) and Institute of Physics (University of Graz). The workshop will host about 20 scientists and students from Hvar Observatory, University of Graz and Zagreb Observatory working in the field of Solar and Heliospheric Physics.

Workshop programme

ISEST 2018 Workshop proceedings, pictures and presentations

Written by Jaša Čalogović Monday, 15 October 2018 14:31

ISEST2018 group photo smallProceedings of the ISEST 2018 Workshop will be published as a special issue of the Central European Astrophysical Bulletin (CEAB) and the deadline to submit your contribution is 31 December 2018. All given oral presentations during ISEST 2018 meeting are now available online. Gallery with ISEST 2018 pictures and videos is also available. XVIth Hvar Astrophysical Colloquium and International Study of Earth-affecting Solar Transients, ISEST 2018 Workshop was organized from 24 to 28 September 2018 in Hvar, Croatia. 

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Hvar Observatory almost destroyed in a forest fire

Written by Jaša Čalogović Wednesday, 12 September 2018 12:31

Hvar fire 2018A forest fire broke out at a distance of 500 meters from the Hvar Observatory on Tuesday, September 11, 2018, at about 4:30 pm. Since the very strong wind was blowing in the direction of the Observatory, the fire spreaded quickly to the telescope domes and Napoleon fortress. The dome of Austrian-Croatian telescope was saved from fire that approached less than few meters from the building thanks to the great efforts of 40 firefighters from Hvar, Stari Grad and Jelsa. The fire was localized around 6 pm with the help of 3 firefighting planes. Luckily, the bigger damages were avoided and the fire didn’t damage any object of the Observatory Hvar, but in total about 5 ha of low vegetation were burnt down. Pictures and video of the fire near Observatory are available below.

Read more: Hvar Observatory almost destroyed in a forest fire


Total Moon eclipse at Hvar Observatory

Written by Jaša Čalogović Sunday, 29 July 2018 12:05

moon eclipse 27072018On 27th July 2018 the total Moon eclipse was also visible from Hvar Observatory. This time the eclipse was one of the longest (almost 2 hours) and very dark since the Moon was passing directly through the middle of the Earth’s shadow. It started at 20:30 h with a maximum at 22:22 h and ended at 23:13 h. About 30 local people and children from Hvar gathered at Hvar Observatory and enjoyed the show on the sky. Mars was also visible near the Moon and it was very bright due to the closest position to the Earth (opposition) in last 15 years. Beside the Moon and Mars on the evening sky were also visible Jupiter and Saturn. All visitors had a chance to look all these objects trough the portable 10-inch telescope.

First results from ALMA published in Astronomy & Astrophysics

Written by Jaša Čalogović Thursday, 31 May 2018 11:45

thumb Brajsa 2018 figOn 23rd May, Astronomy & Astrophysics published Brajša et al. paper “First analysis of solar structures in 1.21 mm full-disc ALMA image of the Sun” on the cover page where the first results using the ALMA (Atacama Large Millimeter/submillimeter Array) for solar observations were presented. The aim of the paper was to identify different structures and their intensities in the solar atmosphere in full-disc solar ALMA images. ALMA is currently the largest radio telescope in the world and it is composed of 66 high-precision antennas, which operate on wavelengths of 0.32 to 3.6 mm.


Lecture about meteorology in Hvar elementary school

Written by Jaša Čalogović Thursday, 26 April 2018 13:41

thumb meorologija Hvar 2018On 24th April, dr. sc. Jaša Čalogović gave a lecture about the meteorology (“Meteorologija – kako prognozirati kakvo će vrijeme biti u Hvaru?”) in the Hvar elementary school. After the lecture the pupils were divided in several groups and a small quiz related to meteorology was organized. Beside the questions, pupils became the synoptic map of the Europe with aim to make alone the weather forecast for Hvar. The symbolic prizes (sweets and chocolate) were given to the best teams that obtained the highest number of points in quiz.


ISSI workshop in Bern

Written by Jaša Čalogović Monday, 16 April 2018 23:45

thumb ISSI meeting 2018From April 8 to 13, 2018 Bojan Vršnak attended the International Team Meeting of the team Manuel Luna: "Large-Amplitude Oscillations as a Probe of Quiescent and Erupting Solar Prominences", held at the International Space Science Institute (ISSI) in Bern, Switzerland. Bojan Vršnak tasks were related to the oscillations of prominence-carrying magnetic flux ropes, implications for the stability and loss of equilibrium. He also gave a talk on physical background of prominence oscillations entitled "Coronal and Prominence Diagnostics based on Prominence Oscillations".


Public lecture about solar eruptive activity

Written by Jaša Čalogović Sunday, 25 March 2018 00:00

thumb HPD Vrsnak2018On March 22, 2018, Bojan Vršnak gave a public lecture on the physical background of eruptive processes on the Sun. The lecture held at the public library "Bogdan Ogrizović" was organized by Croatian Natural Society (Hrvatsko prirodoslovno društvo, HPD). In the lecture entitled "Solar Eruptive Activity" (Sunčeva eruptivna aktivnost), he presented basic mechanisms that cause various forms of solar eruptions, their space-weather consequences and effects in geospace. Pictures from lecture are available here


Winter fairytale at Hvar Observatory

Written by Jaša Čalogović Thursday, 01 March 2018 00:00

snow hvar2018Snow at Hvar and other islands in Dalmatia is quite rare and it happens just for a short time usually once in few years. Cold weather in Europe at the end of February followed with north and cold wind Bora was the reason for snow on Hvar and other nearby islands. It is quite strange to experience Hvar in such white winter atmosphere and we publish several pictures from 27 February to illustrate that.

Picture Gallery


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Webcam at Observatory


  • Solar Activity Level: LOW
    Solar Activitly level is LOW.

    2-day Flare Index (entire sun): 6.7
    X-Class Flares: 0
    M-Class Flares: 0
    C-Class Flares: 5
  • Most Active Region: NOAA 12529
    The Most Active Region is NOAA 12529.

    2-day Flare Index: 3.9
    X-Class Flares: 0
    M-Class Flares: 0
    C-Class Flares: 3

    Region Statistics for Today
    Mount Wilson Class: b
    Area: 0850
    Nummber of Spots: 19
    Flares: C1.8 (07:40)

    Region Statistics for Yesterday
    Mount Wilson Class: b
    Area: 0820
    Nummber of Spots: 16
    Flares: C1.1 (01:36) C1.0 (18:28)


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