Earthquake 1 km N L'Aquila (AQ), Magnitude ML 2.1, 6 April 2009 time 23:51:02 (Timezone Italy)

A magnitude ML 2.1 earthquake occured in region: 1 km N L'Aquila (AQ), on

06-04-2009 21:51:02 (UTC)
06-04-2009 23:51:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3610, 13.3990 at 9 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
L'Aquila	AQ	1	69753	69753
Lucoli	AQ	9	1011	70764
Fossa	AQ	11	721	71485
Ocre	AQ	11	1167	72652
Tornimparte	AQ	11	3187	75839
Scoppito	AQ	12	3727	79566
Pizzoli	AQ	12	4326	83892
Poggio Picenze	AQ	13	1136	85028
Sant'Eusanio Forconese	AQ	13	394	85422
Barete	AQ	14	737	86159
Villa Sant'Angelo	AQ	15	424	86583
San Demetrio ne' Vestini	AQ	15	1854	88437
Rocca di Cambio	AQ	16	533	88970
Barisciano	AQ	16	1828	90798
Cagnano Amiterno	AQ	18	1369	92167
Fagnano Alto	AQ	19	418	92585
Prata d'Ansidonia	AQ	19	496	93081
Capitignano	AQ	20	665	93746
Rocca di Mezzo	AQ	20	1526	95272

Municipalities with at least 50000 inhabitants

An earthquake occurred to

1 Km N of L'Aquila (69753 inhabitants)

42 Km SW of Teramo (54892 inhabitants)

63 Km W of Chieti (51815 inhabitants)

64 Km W of Montesilvano (53738 inhabitants)

66 Km E of Terni (111501 inhabitants)

66 Km NE of Tivoli (56533 inhabitants)

68 Km W of Pescara (121014 inhabitants)

68 Km NE of Guidonia Montecelio (88673 inhabitants)

87 Km SE of Foligno (57155 inhabitants)

91 Km NE of Velletri (53303 inhabitants)

92 Km NE of Roma (2864731 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	ML 2.1	2009-04-06 21:51:02	42.361	13.399	9	2014-10-21 12:27:13	Bollettino Sismico Italiano INGV	763359

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2009-04-06 21:51:02 ± 0.11
Latitude	42.3610 ± 0.0072
Longitude	13.3990 ± 0.0097
Depth (km)	9 ± 1 (from location)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	1000 -> BULLETIN-SISPICK
Event type	earthquake
Origin ID	763359

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	815
Semi-minor axis of confidence ellipse (meter)	756
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	265
Circular confidence region, given by single value of horizontal uncertainty (meter)	1131.4
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	85
Number of associated phases, regardless of their use for origin computation	43
Number of defining phases	18
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.53
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.73924
Number of stations at which the event was observed	30
Number of stations from which data was used for origin computation	11

Magnitude information

ML:2.1

Field	Value
Value	2.1
Uncertainty	0.4
Num. used stations
Type of magnitude	ML
Reference to an origin	763359
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2013-01-05 14:26:15

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Residual	Weight
IV.MMME.BHZ.	2009-04-06T21:52:52.88	10.0	undecidable	manual	Pg	0		0	0
IV.CERA.HHN.	2009-04-06T21:52:42.27	10.0	undecidable	manual	Sg	0		0	0
IV.CAFR.HHE.	2009-04-06T21:52:42.83	10.0	undecidable	manual	Pg	0		0	0
IV.SDI.SHZ.	2009-04-06T21:52:40.74	10.0	undecidable	manual	Pg	0		0	0
IV.MGAB.HHE.	2009-04-06T21:52:40.34	10.0	undecidable	manual	Pg	0		0	0
IV.POFI.HHE.	2009-04-06T21:52:40.93	10.0	undecidable	manual	Pg	0		0	0
IV.CERA.HHN.	2009-04-06T21:52:38.13	10.0	undecidable	manual	Pg	0		0	0
IV.MIDA.HHE.	2009-04-06T21:52:36.02	10.0	undecidable	manual	Pg	0		0	0
IV.GUAR.HHN.	2009-04-06T21:52:36.34	10.0	undecidable	manual	Sg	0		0	0
IV.MURB.HHN.	2009-04-06T21:52:35.20	10.0	undecidable	manual	Pg	0		0	0
IV.RNI2.HHE.	2009-04-06T21:52:35.18	10.0	undecidable	manual	Pg	0		0	0
IV.CING.HHN.	2009-04-06T21:52:34.59	10.0	undecidable	manual	Sg	0		0	0
IV.ASSB.HHN.	2009-04-06T21:52:29.20	10.0	undecidable	manual	Sg	0		0	0
IV.CING.HHN.	2009-04-06T21:52:24.14	10.0	undecidable	manual	Pg	0		0	0
IV.VVLD.HHE.	2009-04-06T21:52:23.50	10.0	undecidable	manual	Sg	0		0	0
IV.OFFI.HHZ.	2009-04-06T21:52:23.30	10.0	undecidable	manual	Pg	0		0	0
IV.CMPO.HHZ.	2009-04-06T21:52:21.72	10.0	undecidable	manual	Pg	0		0	0
IV.ASSB.HHN.	2009-04-06T21:52:18.38	10.0	undecidable	manual	Pg	0		0	0
IV.VVLD.HHE.	2009-04-06T21:52:17.47	10.0	undecidable	manual	Pg	0		0	0
IV.GUAR.HHN.	2009-04-06T21:52:15.89	10.0	undecidable	manual	Pg	0		0	0
IV.MNS.HHN.	2009-04-06T21:52:15.56	10.0	undecidable	manual	Sg	0		0	0
IV.MNS.HHN.	2009-04-06T21:52:12.38	10.0	undecidable	manual	Pg	0		0	0
IV.NRCA.SHZ.	2009-04-06T21:52:09.52	10.0	undecidable	manual	Pg	0		0	0
SI.MOSI.BHE.	2009-04-06T21:51:33.15	10.0	undecidable	manual	Pg	0		0	0
IV.PIEI.HHN.	2009-04-06T21:51:27.26	10.0	undecidable	manual	Pg	0		0	0
IV.INTR.HHN.	2009-04-06T21:51:20.89	0.6	undecidable	manual	Sg	133	56.7987	0.143	45
IV.CESI.HHZ.	2009-04-06T21:51:17.51	0.6	undecidable	manual	Pg	331	82.0512	0.538	39
IV.FDMO.HHE.	2009-04-06T21:51:16.88	0.3	undecidable	manual	Pg	341	79.1652	0.359	62
IV.PTQR.SHZ.	2009-04-06T21:51:14.58	0.6	undecidable	manual	Sg	180	37.629	-1.037	35
IV.INTR.HHN.	2009-04-06T21:51:13.26	0.3	undecidable	manual	Pg	133	56.7987	0.176	67
IV.CERT.HHN.	2009-04-06T21:51:13.58	0.3	undecidable	manual	Pg	217	57.0984	0.449	63
IV.TERO.HHZ.	2009-04-06T21:51:13.64	0.3	undecidable	manual	Sg	30	33.5442	-0.898	56
IV.FIAM.HHZ.	2009-04-06T21:51:11.44	0.3	undecidable	manual	Sg	246	25.2525	-0.462	67
IV.PTQR.SHZ.	2009-04-06T21:51:10.89	0.6	undecidable	manual	Pg	180	37.629	0.772	39
.CAMP.---.	2009-04-06T21:51:10.19	0.6	undecidable	manual	Sg	2	19.4694	0.182	48
IV.VCEL.EHZ.	2009-04-06T21:51:10.15	0.3	undecidable	manual	Pg	84	36.3414	0.216	69
IV.FAGN.HHE.	2009-04-06T21:51:09.46	0.3	undecidable	manual	Sg	125	18.4704	-0.24	71
IV.TERO.HHZ.	2009-04-06T21:51:09.00	0.1	undecidable	manual	Pg	30	33.5442	-0.497	87
IV.FAGN.HHE.	2009-04-06T21:51:07.04	0.1	undecidable	manual	Pg	125	18.4704	0.335	93
.CAMP.---.	2009-04-06T21:51:07.13	0.1	undecidable	manual	Pg	2	19.4694	0.253	94
IV.FIAM.HHZ.	2009-04-06T21:51:07.92	0.1	undecidable	manual	Pg	246	25.2525	-0.051	97
MN.AQU.HHN.	2009-04-06T21:51:05.41	0.1	undecidable	manual	Sg	162	0.7992	-0.254	97
MN.AQU.HHN.	2009-04-06T21:51:04.49	0.1	negative	manual	Pg	162	0.7992	0.121	100

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 2.1 on date 06-04-2009 and time 23:51:02 (Italy) in region 1 km N L'Aquila (AQ)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:2.1