Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 21-01-2012 and time 17:15:23 (Italy) in region 3 km NE Castelsantangelo sul Nera (MC)

A magnitude ML 2.1 earthquake occured in region: 3 km NE Castelsantangelo sul Nera (MC), on

  • 21-01-2012 16:15:23 (UTC)
  • 21-01-2012 17:15:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9080, 13.1800 at 16 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
Castelsantangelo sul Nera MC 3 281 281
Ussita MC 5 444 725
Visso MC 8 1107 1832
Bolognola MC 10 142 1974
Preci PG 12 724 2698
Montemonaco AP 12 604 3302
Acquacanina MC 14 121 3423
Montefortino FM 14 1178 4601
Fiastra MC 14 559 5160
Montegallo AP 15 523 5683
Norcia PG 15 4957 10640
Fiordimonte MC 16 202 10842
Amandola FM 17 3629 14471
Monte Cavallo MC 17 145 14616
Sarnano MC 17 3264 17880
Arquata del Tronto AP 18 1178 19058
Pieve Torina MC 19 1458 20516
Pievebovigliana MC 19 866 21382
Comunanza AP 20 3166 24548

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
51 Km NW of Teramo (54892 inhabitants)
58 Km NE of Terni (111501 inhabitants)
64 Km N of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
98 Km NW of Pescara (121014 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 2.2
ML 2.1 		2012-01-21
16:15:23		 42.908 13.18 16 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1334699
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-01-21 16:15:23 ± 0.08
Latitude 42.9080 ± 0.0036
Longitude 13.1800 ± 0.0086
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1334699

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 705
Semi-minor axis of confidence ellipse (meter) 201
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 806.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 48
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.57
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.83727
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1334699
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 02:34:41

Md:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1334699
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 02:34:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FSSB.HHE. 2012-01-21T16:15:52.39 1.0 undecidable manual Sg 340 92.9403 1.44 13
IV.MPAG.EHZ. 2012-01-21T16:15:50.42 0.6 undecidable manual Sg 337 86.8464 1.084 31
IV.PIEI.HHN. 2012-01-21T16:15:50.39 1.0 undecidable manual Sg 323 86.9463 1.034 16
IV.AOI.HHN. 2012-01-21T16:15:48.59 0.6 undecidable manual Sg 25 78.9654 1.358 27
IV.FAGN.HHE. 2012-01-21T16:15:48.05 1.0 undecidable manual Sg 155 78.5658 0.922 16
IV.FRON.EHZ. 2012-01-21T16:15:47.54 0.3 undecidable manual Sg 332 76.8675 0.85 53
IV.FIAM.HHZ. 2012-01-21T16:15:45.47 0.3 undecidable manual Sg 184 71.1732 0.294 63
IV.MURB.HHN. 2012-01-21T16:15:45.11 10.0 undecidable manual Pg 0 0 0
IV.SSFR.HHN. 2012-01-21T16:15:44.49 0.3 undecidable manual Sg 331 66.7776 0.49 62
IV.ARVD.HHN. 2012-01-21T16:15:44.70 0.6 undecidable manual Sg 344 68.1762 0.333 42
IV.T0104.HHE. 2012-01-21T16:15:43.33 0.3 undecidable manual Sg 168 62.1933 0.551 60
MN.AQU.HHZ. 2012-01-21T16:15:43.98 0.6 undecidable manual Sg 163 64.1913 0.675 38
IV.CESX.HHZ. 2012-01-21T16:15:42.67 0.6 undecidable manual Sg 236 58.5969 0.842 36
IV.CING.HHN. 2012-01-21T16:15:40.11 0.3 undecidable manual Sg 1 51.8037 0.085 69
IV.ATCC.EHE. 2012-01-21T16:15:40.99 0.3 undecidable manual Sg 305 53.4021 0.537 63
IV.FSSB.HHE. 2012-01-21T16:15:39.27 0.6 undecidable manual Pg 340 92.9403 -0.146 42
IV.MGAB.HHE. 2012-01-21T16:15:39.00 1.0 undecidable manual Pg 271 86.7465 0.536 20
IV.TERO.HHN. 2012-01-21T16:15:38.72 0.3 undecidable manual Sg 132 46.9197 0.006 70
IV.PIEI.HHN. 2012-01-21T16:15:38.02 0.6 undecidable manual Pg 323 86.9463 -0.475 39
IV.MPAG.EHZ. 2012-01-21T16:15:38.25 0.6 undecidable manual Pg 337 86.8464 -0.234 42
IV.CAMP.HHE. 2012-01-21T16:15:38.42 0.1 undecidable manual Sg 156 45.3213 0.11 92
IV.SNTG.HHZ. 2012-01-21T16:15:37.73 0.3 undecidable manual Sg 333 43.0236 0.03 71
IV.AOI.HHN. 2012-01-21T16:15:37.09 0.6 undecidable manual Pg 25 78.9654 -0.178 43
IV.FAGN.HHE. 2012-01-21T16:15:37.59 0.6 undecidable manual Pg 155 78.5658 0.382 41
IV.LNSS.HHZ. 2012-01-21T16:15:36.00 0.3 undecidable manual Sg 199 35.742 0.219 69
IV.FRON.EHZ. 2012-01-21T16:15:36.48 0.3 undecidable manual Pg 332 76.8675 -0.474 60
IV.SMA1.EHZ. 2012-01-21T16:15:35.18 0.3 undecidable manual Sg 158 33.3444 0.029 71
MN.AQU.HHZ. 2012-01-21T16:15:35.72 0.6 undecidable manual Pg 163 64.1913 0.718 37
IV.ARVD.HHN. 2012-01-21T16:15:35.18 0.3 undecidable manual Pg 344 68.1762 -0.434 62
IV.FIAM.HHZ. 2012-01-21T16:15:35.56 0.1 undecidable manual Pg 184 71.1732 -0.522 81
IV.T0104.HHE. 2012-01-21T16:15:34.32 0.6 undecidable manual Pg 168 62.1933 -0.376 43
IV.SSFR.HHN. 2012-01-21T16:15:34.93 0.3 undecidable manual Pg 331 66.7776 -0.471 61
IV.ATCC.EHE. 2012-01-21T16:15:33.09 0.1 undecidable manual Pg 305 53.4021 -0.263 88
IV.CESX.HHZ. 2012-01-21T16:15:33.83 0.3 undecidable manual Pg 236 58.5969 -0.321 64
IV.CING.HHN. 2012-01-21T16:15:32.66 0.1 undecidable manual Pg 1 51.8037 -0.447 85
IV.GUMA.HHZ. 2012-01-21T16:15:32.46 0.3 undecidable manual Sg 36 21.2676 0.378 68
IV.OFFI.HHE. 2012-01-21T16:15:32.04 0.3 undecidable manual Pg 86 41.2254 0.554 62
IV.CESI.HHZ. 2012-01-21T16:15:32.97 0.3 undecidable manual Sg 296 24.753 0.019 73
IV.SNTG.HHZ. 2012-01-21T16:15:31.17 0.1 undecidable manual Pg 333 43.0236 -0.593 82
IV.CAMP.HHE. 2012-01-21T16:15:31.64 0.1 undecidable manual Pg 156 45.3213 -0.477 86
IV.TERO.HHN. 2012-01-21T16:15:31.76 0.1 undecidable manual Pg 132 46.9197 -0.588 83
IV.FDMO.HHZ. 2012-01-21T16:15:30.59 0.3 undecidable manual Sg 332 16.0728 -0.278 71
IV.LNSS.HHZ. 2012-01-21T16:15:30.48 0.1 undecidable manual Pg 199 35.742 -0.176 93
IV.NRCA.HHN. 2012-01-21T16:15:29.86 0.3 undecidable manual Sg 213 9.879 0.216 71
IV.SMA1.EHZ. 2012-01-21T16:15:29.95 0.1 undecidable manual Pg 158 33.3444 -0.344 90
IV.GUMA.HHZ. 2012-01-21T16:15:28.45 0.1 undecidable manual Pg 36 21.2676 -0.073 98
IV.CESI.HHZ. 2012-01-21T16:15:28.84 0.1 undecidable manual Pg 296 24.753 -0.182 94
IV.NRCA.HHN. 2012-01-21T16:15:27.11 0.1 undecidable manual Pg 213 9.879 -0.004 100
IV.FDMO.HHZ. 2012-01-21T16:15:27.49 0.1 undecidable manual Pg 332 16.0728 -0.332 93
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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