Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 31-03-2012 and time 13:34:16 (UTC) in region 6 km SW Cittareale (RI)

A magnitude ML 1.5 earthquake occured in region: 6 km SW Cittareale (RI), on

  • 31-03-2012 13:34:16 (UTC)
  • 31-03-2012 15:34:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5840, 13.1080 at 17 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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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Cittareale RI 6 482 482
Posta RI 7 694 1176
Borbona RI 8 617 1793
Leonessa RI 12 2435 4228
Montereale AQ 13 2581 6809
Monteleone di Spoleto PG 15 599 7408
Micigliano RI 15 127 7535
Amatrice RI 16 2657 10192
Cagnano Amiterno AQ 17 1369 11561
Cascia PG 17 3217 14778
Accumoli RI 17 667 15445
Capitignano AQ 17 665 16110
Antrodoco RI 19 2588 18698

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of L'Aquila (69753 inhabitants)
38 Km E of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
72 Km NE of Guidonia Montecelio (88673 inhabitants)
73 Km NE of Tivoli (56533 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
84 Km E of Viterbo (67173 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
91 Km W of Chieti (51815 inhabitants)
92 Km W of Pescara (121014 inhabitants)
92 Km NE of Roma (2864731 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		Md 1.9
ML 1.5 		2012-03-31
13:34:16		 42.584 13.108 17 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1354899
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-03-31 13:34:16 ± 0.13
Latitude 42.5840 ± 0.0054
Longitude 13.1080 ± 0.0086
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1354899

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 585
Semi-minor axis of confidence ellipse (meter) 434
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 922.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.45236
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 1354899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 03:03:33

Md:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 1354899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 03:03:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VCEL.EHN. 2012-03-31T13:34:37.75 10.0 undecidable manual Pg 0 0 0
IV.CESI.HHZ. 2012-03-31T13:34:32.97 0.6 undecidable manual Sg 341 49.5171 0.623 41
IV.FDMO.HHE. 2012-03-31T13:34:31.96 0.6 undecidable manual Sg 358 50.2164 -0.564 41
IV.CESX.HHZ. 2012-03-31T13:34:30.71 0.6 undecidable manual Sg 274 42.624 0.171 46
IV.TERO.HHZ. 2012-03-31T13:34:29.79 0.3 undecidable manual Sg 84 40.7259 -0.236 68
IV.FIAM.HHN. 2012-03-31T13:34:28.43 0.6 undecidable manual Sg 179 35.0427 -0.129 47
IV.NRCA.HHZ. 2012-03-31T13:34:26.70 0.3 undecidable manual Sg 1 27.6501 0.023 73
IV.CAMP.HHE. 2012-03-31T13:34:25.92 0.6 undecidable manual Sg 102 25.1526 -0.125 48
IV.CESI.HHZ. 2012-03-31T13:34:25.94 0.1 undecidable manual Pg 341 49.5171 0.276 89
IV.SMA1.EHZ. 2012-03-31T13:34:24.87 0.3 undecidable manual Sg 74 19.2696 0.231 71
IV.TERO.HHZ. 2012-03-31T13:34:24.21 0.1 undecidable manual Pg 84 40.7259 -0.114 93
IV.CESX.HHZ. 2012-03-31T13:34:24.63 0.3 undecidable manual Pg 274 42.624 0.006 71
IV.FDMO.HHE. 2012-03-31T13:34:24.91 0.3 undecidable manual Pg 358 50.2164 -0.859 54
IV.FIAM.HHN. 2012-03-31T13:34:23.41 0.3 undecidable manual Pg 179 35.0427 -0.069 72
IV.T0104.HHE. 2012-03-31T13:34:22.89 0.6 undecidable manual Pg 143 31.1466 -0.012 49
IV.CAMP.HHE. 2012-03-31T13:34:22.07 0.3 undecidable manual Pg 102 25.1526 0.042 73
IV.LNSS.HHZ. 2012-03-31T13:34:22.04 0.3 undecidable manual Sg 291 5.8941 -0.229 73
IV.NRCA.HHZ. 2012-03-31T13:34:22.49 0.1 undecidable manual Pg 1 27.6501 0.096 96
IV.SMA1.EHZ. 2012-03-31T13:34:21.55 0.1 positive manual Pg 74 19.2696 0.334 93
IV.LNSS.HHZ. 2012-03-31T13:34:19.90 0.1 negative manual Pg 291 5.8941 0.052 100
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download