CORAMOD meeting in Zagreb

Written by Jaša Čalogović Tuesday, 15 November 2016 00:00

thumb Zagreb Obs CORAMOD 2016 The final CORAMOD project meeting was held at the Faculty of Geodesy in Zagreb from 7.-11. November 2016 where the following CORAMOD members participated: Konstantin Herbst, Adrian Vogt, Mateja Dumbović, Bojan Vršnak and Jaša Čalogović. On Thursday, 10. November 2016 Konstantin Herbst held a public lecture at Zagreb Observatory with the title: "Cosmogenic radionuclides - the quest of studying the solar activity over past 10,000 years". During the meeting in Zagreb discussions about upcoming papers that should be soon submitted and further plans for upcoming projects and collaborations were made.

Visit of the Dean to Hvar Observatory

Written by Jaša Čalogović Monday, 03 October 2016 12:35

thumb dean obs 2016 01thumb dean obs 2016 02On Moday, September 26, the Dean of the Faculty of Geodesy, prof. Damir Medak arrived to Hvar and visited Hvar Observatory to get a closer insight into activities and the life at the Observatory. Hrvoje Božić, Bojan Vršnak and Toni Visković showed the Dean solar and stellar telescopes, explained the scientific programs and strategies of the Observatory and briefed him about some infrastructural problems.

XIVth Hvar Astrophysical Colloquium

Written by Jaša Čalogović Sunday, 15 May 2016 00:00

HAC14-group-photoXIVth Hvar Astrophysical Colloquium "Solar and Solar-Terrestrial Physics: Now and in the future" will be organized from 26 to 30 September 2016 in Hvar, Croatia. The scientific sessions will include following topics: Observing techniques, Campaigns and Databases, Activity of Sun and Solar-Like Stars, Eruptive Processes in the Solar Atmosphere, Solar-Terrestrial Connection and the Heliosphere, Space Weather and Space Climate Forecasting. Abstract submission (deadline 15 July 2016) and early registration (150 EUR, deadline 1 September 2016) are now open. It is possible to apply for financial support covered trough SCOSTEP-VarSiti grant for accommodation and/or registration fee (deadline 15 June 2016).

Scientific programme

Mercury transit observed at the Hvar Observatory, 09.05.2016

Written by Jaša Čalogović Tuesday, 10 May 2016 00:00

thumb OH HA mercury transit 20160509 113034The transits of Mercury across the solar disk are rare phenomena, although Mercury orbits the Sun in just 88 days. The reason for this is that Mercury orbits the Sun with the certain angle to the ecliptic, ie. the plane that the Earth orbits the Sun. Mercury transit in Croatia was visible on 9 May 2016, started at 13:12h local time and could be seen for almost 7 hours. Unfortunately, end of transit was not visible from our region because the sunset was at 20:10h and end of transit was at 20:42h. This rare phenomena was possible to observe from Hvar, and it was recoreded in white light and H-alpha using Hvar solar telescope. The next transit of Mercury will be visible from the Croatia in 2019.

Read more: Mercury transit observed at the Hvar Observatory, 09.05.2016


Mateja Dumbović received the national fellowship ”For Women in Science”

Written by Jaša Čalogović Thursday, 05 May 2016 18:14

thumb Prize MD 2016 01On April 27th 2016 fellowships of the national program "For Women in Science" were awarded for the 10th time, organized by L'ORÉAL ADRIA d.o.o. and Croatian commission for UNESCO at Ministry of culture, under sponsorship of Croatian academy of sciences and arts and supported by the Croatian Rectors' conference. Among the four young female scientists awarded with this prestigious fellowship is Mateja Dumbović from Hvar Observatory, Faculty of Geodesy in Zagreb for the research she did during her PhD studies that resulted in her thesis "Analysis and forecasting of coronal mass ejection space weather effects" (supervised by dr. sc. Bojan Vršnak). The ceremony was attended by many esteemed guests, among others the Croatian president Kolinda Grabar-Kitarović and the news was greatly covered by Croatian press.

Read more: Mateja Dumbović received the national fellowship ”For Women in Science”


Festival of science 2016 in Hvar

Written by Jaša Čalogović Thursday, 05 May 2016 16:33

thumb FZ2016 18From 21 to 23 April 2016 Festival of Science was organized at city hall in the town of Hvar, and this year's festival theme was "Science and Art". The event was organized by the Observatory Hvar and the Elementary School of Hvar, Stari Grad, Jelsa and the Archaeological Museum in Zagreb.

Science Festival is being held for the 14th consecutive year in Croatia and its goal is to bring the science to pupils of primary and secondary schools and the entire interested general public. This year, the Science Festival was organized in 18 cities in Croatia, and it was the second time that city of Hvar hosted it. Compared to the last year, organizers offered a much richer program and the Festival in Hvar lasted for three days, that was visited by students of almost all schools on the island (elementary school of Hvar, Stari Grad and Jelsa).

Read more: Festival of science 2016 in Hvar


CORAMOD workshop Hvar 2015

Written by Jaša Čalogović Saturday, 06 June 2015 11:30

thumb CORAMOD 2015 groupA workshop was held at the Hvar Observatory from 26 to 29 May 2015 with general topics on the cosmic ray modulation, Forbush decreases, coronal mass ejection initiation and propagation, and magnetic clouds in the interplanetary space. There were 14 participants from the Physics department of the University of Kiel, Physics Institute of the University of Graz, Space Research Institute in Graz and Hvar Observatory.

Photos from the workshop are available here.

Hvar Observatory participated in 13th Festival of Science

Written by Jaša Čalogović Thursday, 30 April 2015 11:40

thumb FZ2015-SunceFestival of Science with special topic "the Sun" was held for the first time in the Hvar town loggia on 20th April 2015, organized by Primary school Hvar and Hvar Observatory. The aim of festival is promote and raise awareness of science, technology and the environment with the aim of getting children interested in science and technology. The program consisted of the exhibition of student's artwork, a workshop "Funny quiz about the Sun" with more than 40 participants and a lecture "Why and how do we study our nearest star – the Sun?". A promotional/educational stand was set, where information was presented about Hvar Observatory, the Sun and the International Astronomical Union initiatives. Additional educational interactive stand was also set, where prism experiment was performed and that offered several puzzles of the Sun in different colors. During the day the visitors – students, teachers and parents were observing the Sun through the telescope where several sunspots were visible, while in the evening observations of the Moon, Venus, Jupiter and Orion nebula were organized with amateur telescopes.

During the Festival of Science, from 20. to 25. April 2015, staff members of Hvar Observatory gave also two public lectures in Astronomy Center of Rijeka (23.4.) and organized workshop (24.4.) and lecture (25.4.) in Technical museum, Zagreb.

Pictures from Festival of Science in Hvar are available here.

Read more: Hvar Observatory participated in 13th Festival of Science


New space weather forecast tool - FDFT

Written by Mateja Dumbovic Wednesday, 11 March 2015 14:29

thumb FDFTNew space weather forecast tool „Forbush decrease Forecast Tool (FDFT)" is now available at Hvar Observatory webpage. FDFT is based on an empirical probabilistic model for the estimation of the Forbush decrease magnitude based on the remote CME/flare observations. It uses CME-speed, CME width, associated flare source position, associated flare soft X-ray peak intensity, and interaction parameter (likeliness of the CME-CME interaction) as an input. It provides Forbush decrease (FD) magnitude probability distribution and expected FD magnitude interval as an output. The details regarding the forecast method and the evaluation will be described in detail in the manuscript "Forbush decrease prediction based on the remote solar observations" by Dumbović et al., which is in preparation.

Our technician Nikša Novak retired after 36 years

Written by Mateja Dumbovic Tuesday, 10 February 2015 14:31

Nikša Novak farewell party, 28.01.2015Nikša Novak, technician at Hvar Observatory was retired at the begining of this year, after 36 years of employment at Hvar Observatory. Nikša was irreplacable in keeping the Hvar Observatory running smoothly, but also one of the most diligent observers with double solar telescope. Therefore, his colleagues organized a farewell party for him on 28.01.2015. at the Observatory and awarded him a convenient farewell present - a woodcut of Nikša observing with the double solar telescope in the early days of his employment.

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  • 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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