Overall Green Earthquake alert in Northern Mariana Islands from 28 Aug 2018 22:35 UTC to 22:35

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.

M 6.6 in Northern Mariana Islands from 28 Aug 2018 22:35 UTC to 22:35

Hazard models

EQ parameters

Shakemap

Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude:	6.6M
Depth:	51.3 Km
Lat/Lon:	16.784 , 147.109
Event Date:	28 Aug 2018 22:35 UTC 29 Aug 2018 08:35 Local
Exposed Population:	No people within 100km
Source:	PTWC pt18240001
Inserted at:	28 Aug 2018 22:45 UTC
INFORM Coping capacity of the alert score:	1.1 (Northern Mariana Is.)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		Tsunami		GDACS score
PTWC	0		0		0
pt18240001	Scaled population (vector)	0	Max wave alert	0m
	C1 shakemap	-0.59	Max wave realtime	0m
	C2 shakemap	0.53
	Country Vulnerability	0
	INFORM_normalised	1

Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.

Episode Timeline

ID	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1226168	28 Aug 2018 22:35	6.5M, 10km	N/A	No people affected (in 100km)	0m (at 00:00)	00:06	GEOFON
1226170	28 Aug 2018 22:35	6.6M, 51.3km	4.1	N/A (in MMI>=VII)	0m (at 00:00)	00:10	PTWC
1226172	28 Aug 2018 22:35	6.6M, 53km	N/A	No people affected (in 100km)	0m (at 00:00)	00:11	NTWC
1226176	28 Aug 2018 22:35	6.4M, 59.9km	4.04	N/A (in MMI>=VII)	0m (at 00:00)	00:20	NEIC

The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.

The episode that has the last updated information.

* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in Northern Mariana Islands ,of Northern Mariana Is. (population 40,180) . The alertlevel for this event is GREEN

Intensity	Population
	no people
	no people

Shakemaps Timeline

Shake id #	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	1226170	16.76/146.872	6.4	59.9	4.1	28 Aug 2018 22:55	00:20	(new episode)
2	1226176	16.76/146.872	6.4	59.9	4.1	28 Aug 2018 22:56	00:21	(new episode)
3	1226176	16.76/146.872	6.4	59.9	4.04	29 Aug 2018 00:37	02:02	(upd of #2)

Affected Provinces

Intensity	Region Province	Country	Population
	Northern Mariana Is.	Northern Mariana Islands	40000 people
	Northern Mariana Is.	Northern Mariana Islands	3000 people

Affected populated places. Areas of interest

Name	Country	City class	Population	Distance
Tanapag	Northern Mariana Islands	Village	4300 people	227 km
Mutcho	Northern Mariana Islands	Village	-	229 km
Saipan	Northern Mariana Islands	Capital	62000 people	229 km
Garapan	Northern Mariana Islands	Village	4100 people	229 km
Chalan Kanoa	Northern Mariana Islands	Village	3200 people	233 km
Aslito	Northern Mariana Islands	Village	-	235 km
Sunharon Roads	Northern Mariana Islands	Village	-	256 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)	Distance
Nikko		18				0	221 km
Commonwealth Health Center		5				0	229 km
Saipan International	SPN	66	Civ.	Paved	Yes	8700	236 km
Pagan Airstrip		10				0	206 km
West Tinian	TIQ	82	Civ.	Paved	Yes	5900	254 km
Dynasty		46				0	256 km
Rota I International	ROP	185	Civ.	Paved	Yes	6000	351 km

Ports

Name	LOCODE	Country	Distance
Farallon de Medinilla		Northern Mariana Islands	138 km
Guguan Island		Northern Mariana Islands	146 km
Saipan	MPSPN	Northern Mariana Islands	229 km
Pagan Island		Northern Mariana Islands	207 km
Tinian		Northern Mariana Islands	256 km

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.

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.
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