Overall Green Tropical Cyclone alert for RITA-19 in Vanuatu, Solomon Islands from 24 Nov 2019 00:00 UTC to 26 Nov 2019 18:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Green alert Tropical Cyclone for RITA-19

in Vanuatu, Solomon Islands

25 Nov 2019 06 UTC

click on

to select bulletin time

Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone RITA-19 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	GFS
Exposed countries
Exposed population	No people in Category 1 or higher
Maximum wind speed	112 km/h
Maximum storm surge	0.4 m (26 Nov 17:30 UTC)
Vulnerability	High (Solomon Is.)

GDACS Score

GDACS alert score for Tropical Cyclones is 0.5 (GREEN Alert), 1.5 (ORANGE Alert), 2.5 (RED Alert)
For more info on GDACS alert score click here.

	Wind	Storm surge	Rainfall	GDACS score
GFS Current	112 km/h	0.4 m	192 mm	0.5
GFS Overall	137 km/h	0.5 m	452 mm	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

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Wind

137 km/h

No people by wind speeds of Tropical Storm strength or above

Wind exposed population - AoIs

No exposed population (in Tropical Storm or higher) based on the bulletin of 25 Nov 2019 06:00 UTC

See TC classification SSHS

Wind Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

N°	Date (UTC)	Max Winds (km/h)	Pop in Cat. 1 or higher	TS	Cat. 1	Cat. 2	Cat. 3	Cat. 4	Cat. 5
1	24 Nov 2019 00:00	79	-	-	-	-	-	-	-
2	24 Nov 2019 06:00	112	-	-	-	-	-	-	-
3	24 Nov 2019 12:00	97	-	-	-	-	-	-	-
4	24 Nov 2019 18:00	112	-	-	-	-	-	-	-
5	25 Nov 2019 00:00	122	-	-	-	-	-	-	-
6	25 Nov 2019 06:00	112	-	-	-	-	-	-	-

Download:

Impact estimation for the next 72h

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Rainfall

Rain exposed population - AoIs

Estimations based on the bulletin of 25 Nov 2019 06:00 UTC

Level	Country	Population
50-100 mm	Fiji	2,164

Rain Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

N°	Date (UTC)	Max Rainfall (mm)	Pop >100mm or higher	50-100	100-250	250-500	500-750	750-1000	>1000	Countries
1	24 Nov 2019 00:00	222	-	-	-	-	-	-	-
2	24 Nov 2019 06:00	118	-	-	-	-	-	-	-
3	24 Nov 2019 12:00	135	-	-	-	-	-	-	-
4	24 Nov 2019 18:00	99	-		-	-	-	-	-	Solomon Islands
5	25 Nov 2019 00:00	107	-	-	-	-	-	-	-
6	25 Nov 2019 06:00	225	-		-	-	-	-	-	Fiji

Impact estimation for the next 72h

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StormSurge

0.4 m

The maximum Storm surge height is 0.4m in Naindi, Fiji. This height is estimated for 26 Nov 2019 17:30 UTC .

The JRC has developed an experimental global storm surge model, which is run after each advisory issued by the regional tropical cyclone centres. The calculations are published about 20 minutes after a new advisory is detected by GDACS. The calculations identify the populated places affected by storm surge up to three days in advance, using the forecasted track. When forecasts change, the associated storm surge changes too and alert levels may go up or down. All links, data, statistics and maps refer to the latest available calculation. If the calculation for the last advisory is not completed, the latest available calculation is shown.

Storm Surge Exposed population - AoIs

Storm Surge Exposed locations

Calculation based on the bulletin of 25 Nov 2019 06:00 UTC

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	26 Nov 2019 17:30	Naindi	Fiji	0.4
	26 Nov 2019 17:30	Korosi	Fiji	0.4
	26 Nov 2019 17:30	Korotasere	Fiji	0.4
	26 Nov 2019 17:30	Naweni	Fiji	0.4
	26 Nov 2019 17:30	Nakarambo	Fiji	0.4
	26 Nov 2019 17:30	Viani	Fiji	0.4
	26 Nov 2019 17:30	Ndrekeniwai	Fiji	0.4
	26 Nov 2019 17:30	Mbangasau	Fiji	0.3
	26 Nov 2019 08:15	Malake	Fiji	0.3
	26 Nov 2019 08:15	Biagunu	Fiji	0.3
	26 Nov 2019 08:15	Lao	Fiji	0.3
	26 Nov 2019 17:45	Nailou	Fiji	0.3
	26 Nov 2019 17:45	Nawi	Fiji	0.3
	25 Nov 2019 14:15	Nayavutoka	Fiji	0.2
	25 Nov 2019 14:15	Korovou	Fiji	0.2
	25 Nov 2019 14:15	Lodoni	Fiji	0.2
	25 Nov 2019 14:15	Lawaki	Fiji	0.2
	25 Nov 2019 14:15	Naingani	Fiji	0.2
	25 Nov 2019 14:15	Navuti	Fiji	0.2
	25 Nov 2019 10:30	Nagumu	Fiji	0.2
	25 Nov 2019 10:30	Nanduri	Fiji	0.2
	25 Nov 2019 10:30	Vatutandova	Fiji	0.2
	25 Nov 2019 22:00	Rakiraki	Fiji	0.2
	25 Nov 2019 22:00	Vaileka	Fiji	0.2
	25 Nov 2019 22:00	Nanukuloa	Fiji	0.2
	25 Nov 2019 22:00	Nasau	Fiji	0.2
	25 Nov 2019 14:30	Togowere	Fiji	0.2
	26 Nov 2019 17:30	Takataka	Solomon Islands	0.2
	26 Nov 2019 17:30	Ahia	Solomon Islands	0.2
	25 Nov 2019 14:30	Nasaga	Fiji	0.2
	25 Nov 2019 14:30	Rukuruku	Fiji	0.2
	25 Nov 2019 14:30	Lovoni	Fiji	0.2
	25 Nov 2019 14:30	Nauouo	Fiji	0.2
	25 Nov 2019 22:30	Tavua	Fiji	0.2
	25 Nov 2019 22:30	Rabulu	Fiji	0.2
	27 Nov 2019 03:45	Veranaue	Solomon Islands	0.2
	27 Nov 2019 03:45	Saua	Solomon Islands	0.2
	27 Nov 2019 03:45	Tatamba	Solomon Islands	0.2
	27 Nov 2019 03:45	Sidu	Solomon Islands	0.2
	27 Nov 2019 03:45	Lokiha	Solomon Islands	0.2
	27 Nov 2019 03:45	Vuluva	Solomon Islands	0.2
	25 Nov 2019 22:45	Koroinasolo	Fiji	0.2
	25 Nov 2019 22:45	Savu Sau	Fiji	0.2
	25 Nov 2019 22:45	Navinggiri	Fiji	0.2
	25 Nov 2019 22:45	Yangganga	Fiji	0.2
	25 Nov 2019 22:45	Nawailevu	Fiji	0.2
	27 Nov 2019 20:15	Dhadhaje	Solomon Islands	0.2
	27 Nov 2019 20:15	Sepi	Solomon Islands	0.2
	25 Nov 2019 14:15	Levuka	Fiji	0.2
	28 Nov 2019 01:45	Nailanga	Fiji	0.2
	28 Nov 2019 01:45	Sorokoba	Fiji	0.2
	28 Nov 2019 01:45	Ba	Fiji	0.2
	25 Nov 2019 14:30	Lautoka	Fiji	0.2
	25 Nov 2019 13:15	Vangai	Fiji	0.2
	25 Nov 2019 13:15	Vunikura	Fiji	0.2
	25 Nov 2019 13:15	Napuka	Fiji	0.2
	25 Nov 2019 20:15	Yandina	Solomon Islands	0.2
	25 Nov 2019 14:15	Nalauwaki	Fiji	0.2
	25 Nov 2019 14:15	Soso	Fiji	0.2
	25 Nov 2019 14:15	Somosomo	Fiji	0.2
	25 Nov 2019 12:45	Namboutini	Fiji	0.2
	28 Nov 2019 02:00	Natunuka	Fiji	0.2
	25 Nov 2019 20:00	Ouanache	New Caledonia	0.2
	25 Nov 2019 20:00	Paola	New Caledonia	0.2
	25 Nov 2019 20:00	Vieux Tuho	New Caledonia	0.2
	25 Nov 2019 20:00	Touho	New Caledonia	0.2
	25 Nov 2019 20:00	Kokengone	New Caledonia	0.2
	27 Nov 2019 04:15	Ghoveo	Solomon Islands	0.2
	26 Nov 2019 19:30	Vunivatu	Fiji	0.2
	26 Nov 2019 19:30	Navukembuli	Fiji	0.2
	26 Nov 2019 19:30	Naua	Fiji	0.2
	26 Nov 2019 19:30	Namukalau	Fiji	0.2
	25 Nov 2019 11:45	Lungga	Solomon Islands	0.2
	25 Nov 2019 11:45	Tutuva	Solomon Islands	0.2
	25 Nov 2019 11:45	Sopanitogha	Solomon Islands	0.2
	25 Nov 2019 11:45	Ambuavao	Solomon Islands	0.2
	25 Nov 2019 11:45	Ghorambau	Solomon Islands	0.2
	25 Nov 2019 11:45	Komuvadha	Solomon Islands	0.2
	25 Nov 2019 11:45	Ngalikomba	Solomon Islands	0.2
	25 Nov 2019 11:45	Komukea	Solomon Islands	0.2
	25 Nov 2019 19:45	Kulu	Solomon Islands	0.2
	25 Nov 2019 19:45	Mbokoaghau	Solomon Islands	0.2
	25 Nov 2019 19:45	Tambunimane	Solomon Islands	0.2
	25 Nov 2019 19:45	Mbelasara	Solomon Islands	0.2
	25 Nov 2019 19:45	Vanuagobu	Solomon Islands	0.2
	25 Nov 2019 19:45	Aola	Solomon Islands	0.2
	27 Nov 2019 04:15	Suavanao	Solomon Islands	0.2
	27 Nov 2019 04:15	Zuzuao Point	Solomon Islands	0.2
	25 Nov 2019 22:30	Nasarowangga	Fiji	0.2
	25 Nov 2019 22:30	Navindamu	Fiji	0.2
	25 Nov 2019 23:30	Natua	Fiji	0.1
	25 Nov 2019 23:30	Mbangata	Fiji	0.1
	25 Nov 2019 23:30	Savusavu	Fiji	0.1
	27 Nov 2019 04:00	Bolitei	Solomon Islands	0.1
	25 Nov 2019 08:15	Poro	New Caledonia	0.1
	25 Nov 2019 08:15	Kouaoua	New Caledonia	0.1
	27 Nov 2019 04:15	Fupukuna	Solomon Islands	0.1
	27 Nov 2019 04:15	Buala	Solomon Islands	0.1
	27 Nov 2019 04:15	Kimage	Solomon Islands	0.1
	25 Nov 2019 22:30	Matayalevu	Fiji	0.1
	25 Nov 2019 22:30	Matacawalevu	Fiji	0.1
	25 Nov 2019 22:30	Sisili	Fiji	0.1
	25 Nov 2019 22:30	Nacula	Fiji	0.1
	25 Nov 2019 22:30	Navotua	Fiji	0.1
	25 Nov 2019 22:30	Tamusua	Fiji	0.1
	25 Nov 2019 11:45	Kakambona	Solomon Islands	0.1
	25 Nov 2019 11:45	Honiara	Solomon Islands	0.1
	25 Nov 2019 11:45	Tulagi	Solomon Islands	0.1
	25 Nov 2019 11:45	Vura	Solomon Islands	0.1
	25 Nov 2019 11:45	Nata	Solomon Islands	0.1
	25 Nov 2019 11:45	Bungano	Solomon Islands	0.1
	25 Nov 2019 11:45	Gavuhoho	Solomon Islands	0.1
	25 Nov 2019 11:45	Vunuha	Solomon Islands	0.1
	25 Nov 2019 11:45	Taroaniara	Solomon Islands	0.1
	25 Nov 2019 11:45	Rara	Solomon Islands	0.1
	25 Nov 2019 11:45	Tokopigopi	Solomon Islands	0.1
	25 Nov 2019 11:45	Kaliala	Solomon Islands	0.1
	25 Nov 2019 11:45	Ghairavu	Solomon Islands	0.1
	25 Nov 2019 11:45	Vatupura	Solomon Islands	0.1
	25 Nov 2019 11:45	Boromoli	Solomon Islands	0.1
	25 Nov 2019 11:45	Small Nagela	Solomon Islands	0.1
	25 Nov 2019 11:45	Hanivaivine	Solomon Islands	0.1
	25 Nov 2019 11:45	Siota	Solomon Islands	0.1
	25 Nov 2019 11:45	Kombe	Solomon Islands	0.1
	25 Nov 2019 11:45	Longapolo	Solomon Islands	0.1
	25 Nov 2019 11:45	Vuturua	Solomon Islands	0.1
	25 Nov 2019 11:45	Toa	Solomon Islands	0.1
	25 Nov 2019 11:45	Ghole	Solomon Islands	0.1
	25 Nov 2019 11:45	Aruliho	Solomon Islands	0.1
	25 Nov 2019 11:45	Boitsatsu	Solomon Islands	0.1
	25 Nov 2019 11:45	Kusini	Solomon Islands	0.1
	28 Nov 2019 02:00	Namaka	Fiji	0.1
	25 Nov 2019 14:15	Naimasimasi	Fiji	0.1
	25 Nov 2019 14:15	Ucunivanua	Fiji	0.1
	25 Nov 2019 11:45	Reko	Solomon Islands	0.1
	25 Nov 2019 11:45	Baroni	Solomon Islands	0.1
	25 Nov 2019 11:45	Chahoga	Solomon Islands	0.1
	25 Nov 2019 11:45	Chapuru	Solomon Islands	0.1
	25 Nov 2019 11:45	Vatupilei	Solomon Islands	0.1
	25 Nov 2019 11:45	Petupai	Solomon Islands	0.1
	27 Nov 2019 12:15	Litoghahira	Solomon Islands	0.1
	27 Nov 2019 12:15	Dedeu	Solomon Islands	0.1
	27 Nov 2019 12:15	Samasodu Point	Solomon Islands	0.1
	27 Nov 2019 12:15	Dadale	Solomon Islands	0.1
	27 Nov 2019 12:15	Filuo	Solomon Islands	0.1
	27 Nov 2019 12:15	Hurepelo	Solomon Islands	0.1
	27 Nov 2019 12:15	Tuarugu	Solomon Islands	0.1
	27 Nov 2019 12:15	Biluro	Solomon Islands	0.1
	27 Nov 2019 12:15	Susubona	Solomon Islands	0.1
	28 Nov 2019 02:15	Tawake	Fiji	0.1
	27 Nov 2019 12:15	Kava	Solomon Islands	0.1
	25 Nov 2019 17:00	Ometteux	New Caledonia	0.1
	25 Nov 2019 17:00	Ponerihouen	New Caledonia	0.1
	25 Nov 2019 17:00	Bayes	New Caledonia	0.1
	25 Nov 2019 17:00	Mou	New Caledonia	0.1
	25 Nov 2019 17:00	Moneo	New Caledonia	0.1
	25 Nov 2019 17:00	Ho	New Caledonia	0.1
	25 Nov 2019 17:00	Meomo	New Caledonia	0.1
	25 Nov 2019 11:45	Lungua	Solomon Islands	0.1
	25 Nov 2019 20:00	Loalonga	Solomon Islands	0.1
	25 Nov 2019 11:45	Veralevuha	Solomon Islands	0.1
	25 Nov 2019 11:45	Taba	Solomon Islands	0.1
	25 Nov 2019 11:45	Chamburu	Solomon Islands	0.1
	25 Nov 2019 14:00	Tavua	Fiji	0.1
	25 Nov 2019 14:00	Solevu	Fiji	0.1
	25 Nov 2019 17:00	Poindimie	New Caledonia	0.1
	25 Nov 2019 10:30	Nasea	Fiji	0.1
	25 Nov 2019 19:45	Komunimboko	Solomon Islands	0.1
	25 Nov 2019 10:15	Saint-Gabriel	New Caledonia	0.1
	25 Nov 2019 10:15	Saint Roch	New Caledonia	0.1
	25 Nov 2019 10:15	Ngoye	New Caledonia	0.1
	25 Nov 2019 10:15	Petit-Borindi	New Caledonia	0.1
	25 Nov 2019 14:45	Teci	Fiji	0.1
	27 Nov 2019 12:15	Bahi	Solomon Islands	0.1
	27 Nov 2019 12:15	Naro	Solomon Islands	0.1
	27 Nov 2019 12:15	Maravovo	Solomon Islands	0.1
	27 Nov 2019 04:00	A'ama	Solomon Islands	0.1
	27 Nov 2019 04:00	Afusalo	Solomon Islands	0.1
	27 Nov 2019 04:00	Seve	Solomon Islands	0.1
	27 Nov 2019 04:00	Rere	Solomon Islands	0.1
	27 Nov 2019 04:00	Mbulo	Solomon Islands	0.1
	27 Nov 2019 04:00	Rua Sura	Solomon Islands	0.1
	27 Nov 2019 04:00	Lumu	Solomon Islands	0.1
	27 Nov 2019 04:00	Sitaronda	Solomon Islands	0.1
	25 Nov 2019 19:30	Bina	Solomon Islands	0.1
	25 Nov 2019 19:30	Manaba	Solomon Islands	0.1
	25 Nov 2019 19:30	Baunani	Solomon Islands	0.1
	25 Nov 2019 19:30	Dinare	Solomon Islands	0.1
	25 Nov 2019 19:30	Abungari	Solomon Islands	0.1
	25 Nov 2019 19:30	Kunura	Solomon Islands	0.1
	27 Nov 2019 03:45	Alite'au	Solomon Islands	0.1
	25 Nov 2019 19:30	Auki	Solomon Islands	0.1
	27 Nov 2019 03:45	Dala	Solomon Islands	0.1
	27 Nov 2019 03:45	Gwaunatafu	Solomon Islands	0.1
	26 Nov 2019 04:00	Lekia	New Caledonia	0.1
	26 Nov 2019 04:00	Fayaoue	New Caledonia	0.1
	26 Nov 2019 04:00	Wadrilla	New Caledonia	0.1
	26 Nov 2019 04:00	Ognahu	New Caledonia	0.1
	26 Nov 2019 04:00	Wegnec St-Joseph	New Caledonia	0.1
	26 Nov 2019 04:00	Teouta	New Caledonia	0.1
	26 Nov 2019 04:00	Ognat	New Caledonia	0.1
	28 Nov 2019 02:15	Nadi	Fiji	0.1
	27 Nov 2019 03:45	Fote	Solomon Islands	0.1
	25 Nov 2019 19:30	Koetungi	Solomon Islands	0.1
	25 Nov 2019 19:30	Korai	Solomon Islands	0.1
	27 Nov 2019 12:15	Ghaningangao	Solomon Islands	0.1
	27 Nov 2019 12:15	Hularu	Solomon Islands	0.1
	27 Nov 2019 12:15	Haliupai	Solomon Islands	0.1
	25 Nov 2019 19:30	Surairo	Solomon Islands	0.1
	28 Nov 2019 02:15	Sawaieke	Fiji	0.1
	28 Nov 2019 02:15	Vione	Fiji	0.1
	28 Nov 2019 02:15	Dalice	Fiji	0.1
	25 Nov 2019 19:30	Hauhui	Solomon Islands	0.1
	25 Nov 2019 19:30	O'io	Solomon Islands	0.1
	25 Nov 2019 19:30	Komunihara	Solomon Islands	0.1
	25 Nov 2019 19:30	Hu'umarere	Solomon Islands	0.1
	25 Nov 2019 06:30	Houailou	New Caledonia	0.1
	25 Nov 2019 06:30	Ouakaya	New Caledonia	0.1
	27 Nov 2019 12:15	Kau	Solomon Islands	0.1
	27 Nov 2019 12:15	Tangarare	Solomon Islands	0.1
	27 Nov 2019 04:15	'Ailali	Solomon Islands	0.1
	27 Nov 2019 04:15	Ato	Solomon Islands	0.1
	25 Nov 2019 22:45	Ndenimanu	Fiji	0.1
	25 Nov 2019 22:45	Ndalomo	Fiji	0.1
	28 Nov 2019 02:15	Momi	Fiji	0.1
	27 Nov 2019 12:15	Chochokiki	Solomon Islands	0.1
	27 Nov 2019 12:15	Hoverihi	Solomon Islands	0.1
	25 Nov 2019 19:30	Sanggasere	Solomon Islands	0.1
	25 Nov 2019 19:30	Alavugu	Solomon Islands	0.1
	25 Nov 2019 19:30	Poinagobo	Solomon Islands	0.1
	25 Nov 2019 19:30	Makina	Solomon Islands	0.1
	25 Nov 2019 19:30	Ione	Solomon Islands	0.1
	25 Nov 2019 14:00	Kasavu	Fiji	0.1
	25 Nov 2019 14:00	Nausori	Fiji	0.1
	25 Nov 2019 14:00	Cautata	Fiji	0.1
	25 Nov 2019 14:00	Dromuna	Fiji	0.1
	27 Nov 2019 12:15	Konggau	Solomon Islands	0.1
	27 Nov 2019 12:15	Lamuas	Solomon Islands	0.1
	27 Nov 2019 04:00	Fokinkorra	Solomon Islands	0.1
	27 Nov 2019 04:00	Manu	Solomon Islands	0.1
	27 Nov 2019 04:00	Kwaimbaambaala	Solomon Islands	0.1
	27 Nov 2019 04:00	Uruilangi	Solomon Islands	0.1
	28 Nov 2019 02:15	Nukusa	Fiji	0.1
	27 Nov 2019 12:15	Ouitcho	Solomon Islands	0.1
	27 Nov 2019 12:15	Takatakati	Solomon Islands	0.1
	27 Nov 2019 12:15	Koraga	Solomon Islands	0.1
	25 Nov 2019 19:30	Haarumou	Solomon Islands	0.1
	27 Nov 2019 12:15	Chapunamo	Solomon Islands	0.1
	27 Nov 2019 12:15	Euro	Solomon Islands	0.1
	27 Nov 2019 04:15	Malou	Solomon Islands	0.1
	27 Nov 2019 04:15	Paunairo	Solomon Islands	0.1
	27 Nov 2019 04:15	Manikiriu	Solomon Islands	0.1
	27 Nov 2019 04:15	Olomburi	Solomon Islands	0.1
	25 Nov 2019 23:45	Waisa	Fiji	0.1
	25 Nov 2019 14:30	Naruwai	Fiji	0.1
	25 Nov 2019 14:30	Nabouwalu	Fiji	0.1
	25 Nov 2019 14:00	Thavanga	Fiji	0.1
	25 Nov 2019 14:00	Ndaria	Fiji	0.1
	25 Nov 2019 14:00	Rave-rave	Fiji	0.1
	25 Nov 2019 14:00	Ndawara	Fiji	0.1
	27 Nov 2019 12:15	Iruiru	Solomon Islands	0.1
	27 Nov 2019 12:15	Nduindui	Solomon Islands	0.1
	25 Nov 2019 20:00	Thio	New Caledonia	0.1
	25 Nov 2019 13:30	Gasele	Fiji	0.1
	25 Nov 2019 13:30	Soso	Fiji	0.1
	25 Nov 2019 13:30	Kavala	Fiji	0.1
	25 Nov 2019 13:30	Kaduvu	Fiji	0.1
	25 Nov 2019 13:30	Nukuvou	Fiji	0.1
	25 Nov 2019 13:30	Nabouwalu	Fiji	0.1
	25 Nov 2019 13:30	Vabea	Fiji	0.1
	25 Nov 2019 23:30	Laucala	Fiji	0.1
	25 Nov 2019 23:30	Lokia	Fiji	0.1
	25 Nov 2019 23:30	Nasilai	Fiji	0.1

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.