Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 12-03-1987 and time 14:45:50 (UTC) in region 2 km NE Montenero Sabino (RI)

A magnitude Md 2.5 earthquake occured in region: 2 km NE Montenero Sabino (RI), on

  • 12-03-1987 14:45:50 (UTC)
  • 12-03-1987 15:45:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.2970, 12.8290 at 5 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
Montenero Sabino RI 2 299 299
Poggio San Lorenzo RI 5 589 888
Torricella in Sabina RI 5 1342 2230
Casaprota RI 5 744 2974
Monte San Giovanni in Sabina RI 6 714 3688
Belmonte in Sabina RI 6 636 4324
Monteleone Sabino RI 8 1224 5548
Frasso Sabino RI 8 743 6291
Salisano RI 8 567 6858
Mompeo RI 8 530 7388
Rocca Sinibalda RI 8 815 8203
Poggio Nativo RI 9 2622 10825
Castelnuovo di Farfa RI 10 1059 11884
Poggio Catino RI 11 1341 13225
Toffia RI 11 1058 14283
Poggio Moiano RI 11 2751 17034
Roccantica RI 12 563 17597
Longone Sabino RI 12 597 18194
Rieti RI 12 47698 65892
Poggio Mirteto RI 12 6315 72207
Fara in Sabina RI 13 13742 85949
Montopoli di Sabina RI 13 4210 90159
Concerviano RI 13 291 90450
Colle di Tora RI 14 372 90822
Contigliano RI 14 3783 94605
Casperia RI 14 1246 95851
Cittaducale RI 14 6828 102679
Castel di Tora RI 14 288 102967
Scandriglia RI 15 3108 106075
Cantalupo in Sabina RI 15 1685 107760
Nerola RM 15 1926 109686
Montasola RI 16 395 110081
Torri in Sabina RI 17 1256 111337
Cottanello RI 17 563 111900
Varco Sabino RI 17 187 112087
Selci RI 17 1106 113193
Montorio Romano RM 18 1984 115177
Ascrea RI 18 234 115411
Greccio RI 18 1558 116969
Paganico Sabino RI 18 172 117141
Torrita Tiberina RM 19 1089 118230
Vacone RI 19 256 118486
Pozzaglia Sabina RI 19 360 118846
Forano RI 19 3179 122025
Montelibretti RM 19 5323 127348
Filacciano RM 20 477 127825
Marcetelli RI 20 89 127914
Petrella Salto RI 20 1197 129111
Castel Sant'Angelo RI 20 1308 130419

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SE of Terni (111501 inhabitants)
34 Km N of Guidonia Montecelio (88673 inhabitants)
37 Km N of Tivoli (56533 inhabitants)
47 Km W of L'Aquila (69753 inhabitants)
53 Km NE of Roma (2864731 inhabitants)
61 Km E of Viterbo (67173 inhabitants)
68 Km N of Velletri (53303 inhabitants)
74 Km S of Foligno (57155 inhabitants)
75 Km NE of Pomezia (62966 inhabitants)
76 Km NE of Fiumicino (78395 inhabitants)
79 Km N of Aprilia (73446 inhabitants)
82 Km W of Teramo (54892 inhabitants)
88 Km E of Civitavecchia (52991 inhabitants)
92 Km N of Latina (125985 inhabitants)
96 Km N of Anzio (54211 inhabitants)
97 Km SE of Perugia (166134 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 2.5 1987-03-12
14:45:50		 42.297 12.829 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 42699
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-03-12 14:45:50 ± 0.282
Latitude 42.2970 ± 0.0138
Longitude 12.8290 ± 0.0244
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 42699

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2524.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 221
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00380
Epicentral distance of station farthest from the epicenter (degree) 0.01077
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 42699
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:42:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.ARV.Z. 1987-03-12T14:46:31.50 10.0 undecidable manual SN 4 1.1988 0.5 0.3
--.SD1.Z. 1987-03-12T14:46:23.00 10.0 undecidable manual SG 128 0.9324 -0.45 0.5
--.ASS.Z. 1987-03-12T14:46:18.50 10.0 undecidable manual SG 350 0.777 0.2 0.8
--.ARV.Z. 1987-03-12T14:46:14.00 10.0 undecidable manual PN 4 1.1988 0.1 1.9
--.SD1.Z. 1987-03-12T14:46:09.70 10.0 undecidable manual PG 128 0.9324 0.16 2
--.ASS.Z. 1987-03-12T14:46:06.00 10.0 undecidable manual PG 350 0.777 -0.57 0.8
--.AQU.Z. 1987-03-12T14:46:06.50 10.0 undecidable manual SG 82 0.4218 -0.57 0.3
--.AQU.Z. 1987-03-12T14:46:00.50 10.0 undecidable manual PG 82 0.4218 0.42 1.3
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