Earthquake 3 km W Castel Gandolfo (RM), Magnitude ML 1.1, 27 March 2009 time 01:03:30 (Timezone UTC)

A magnitude ML 1.1 earthquake occured in region: 3 km W Castel Gandolfo (RM), on

27-03-2009 01:03:30 (UTC)
27-03-2009 02:03:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7530, 12.6220 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
Castel Gandolfo	RM	3	8997	8997
Marino	RM	4	43026	52023
Albano Laziale	RM	4	41715	93738
Ariccia	RM	5	19407	113145
Grottaferrata	RM	6	20327	133472
Ciampino	RM	6	38412	171884
Rocca di Papa	RM	7	17034	188918
Genzano di Roma	RM	8	23970	212888
Frascati	RM	8	22087	234975
Nemi	RM	9	1943	236918
Lanuvio	RM	11	13632	250550
Monte Porzio Catone	RM	11	8693	259243
Monte Compatri	RM	12	11978	271221
Rocca Priora	RM	13	11962	283183
Pomezia	RM	14	62966	346149
Colonna	RM	14	4287	350436
Velletri	RM	15	53303	403739
San Cesareo	RM	17	15153	418892
Ardea	RM	17	49183	468075
Aprilia	LT	18	73446	541521
Lariano	RM	18	13432	554953
Roma	RM	19	2864731	3419684
Zagarolo	RM	20	17843	3437527

Municipalities with at least 50000 inhabitants

An earthquake occurred to

14 Km NE of Pomezia (62966 inhabitants)

15 Km NW of Velletri (53303 inhabitants)

18 Km N of Aprilia (73446 inhabitants)

19 Km SE of Roma (2864731 inhabitants)

28 Km SW of Tivoli (56533 inhabitants)

29 Km SW of Guidonia Montecelio (88673 inhabitants)

32 Km E of Fiumicino (78395 inhabitants)

34 Km N of Anzio (54211 inhabitants)

39 Km NW of Latina (125985 inhabitants)

78 Km E of Civitavecchia (52991 inhabitants)

85 Km SE of Viterbo (67173 inhabitants)

90 Km S of Terni (111501 inhabitants)

93 Km SW of L'Aquila (69753 inhabitants)

Recent and historical seismicity

Not available maps for this sismic event.

Seismic hazard

Not available maps for this sismic event.

Shakemap

Not available maps for this sismic event.

Felt maps

Not available maps for this sismic event.

Locations history

Type	Magnitude	Date and Time (UTC)	Latitude	Longitude	Depth (km)	Published time (UTC)	Author	Location ID
Bulletin Rev1000	Md 1.7 ML 1.1	2009-03-27 01:03:30	41.753	12.622	0	2014-10-21 12:27:13	Bollettino Sismico Italiano INGV	752309

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2009-03-27 01:03:30 ± 0.35
Latitude	41.7530 ± 0.0090
Longitude	12.6220 ± 0.0193
Depth (km)	0 ± 0 (from location)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	1000 -> BULLETIN-SISPICK
Event type	earthquake
Origin ID	752309

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	1842
Semi-minor axis of confidence ellipse (meter)	1052
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	288
Circular confidence region, given by single value of horizontal uncertainty (meter)	1886.8
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	264
Number of associated phases, regardless of their use for origin computation	10
Number of defining phases	7
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.31
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.09443
Number of stations at which the event was observed	7
Number of stations from which data was used for origin computation	4

Magnitudes information

ML:1.1

Field	Value
Value	1.1
Uncertainty	0.1
Num. used stations
Type of magnitude	ML
Reference to an origin	752309
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2013-01-05 14:13:29

Md:1.7

Field	Value
Value	1.7
Uncertainty	0.1
Num. used stations
Type of magnitude	Md
Reference to an origin	752309
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2013-01-05 14:13:29

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Residual	Weight
IV.PRMA.HHZ.	2009-03-27T01:03:49.36	10.0	undecidable	manual	Pg	0		0	0
IV.RMP.HHZ.	2009-03-27T01:03:33.57	0.3	undecidable	manual	Sg	46	9.2796	0.322	71
IV.LAV9.SHZ.	2009-03-27T01:03:32.38	0.3	undecidable	manual	Pg	142	10.4784	0.26	71
IV.RDP.BHN.	2009-03-27T01:03:32.79	0.3	undecidable	manual	Sg	85	7.881	0.034	75
IV.RDP.BHN.	2009-03-27T01:03:31.34	0.1	undecidable	manual	Pg	85	7.881	-0.26	96
IV.RMP.HHZ.	2009-03-27T01:03:31.92	0.1	undecidable	manual	Pg	46	9.2796	0.035	100
IV.MA9.HHZ.	2009-03-27T01:03:31.24	0.3	undecidable	manual	Sg	58	3.6963	-0.055	75
IV.MA9.HHZ.	2009-03-27T01:03:30.57	0.1	undecidable	manual	Pg	58	3.6963	-0.187	98
IV.CDCA.EHZ.	2009-03-27T01:03:28.57	10.0	undecidable	manual	Pg	0		0	0
IV.FAEN.HHE.	2009-03-27T01:03:04.88	10.0	undecidable	manual	Pg	0		0	0

TDMT - Time Domain Moment Tensor

Not available TDMT solution for this seismic event.

Fault Plane solutions in the area

Not available maps for this sismic event.

Download

Type	Description	Link
QuakeML - small	Event, Origin, FocalMechanism	Download
QuakeML - full	Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude	Download

Earthquake with magnitude of ML 1.1 on date 27-03-2009 and time 01:03:30 (UTC) in region 3 km W Castel Gandolfo (RM)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:1.1

Md:1.7