Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 20-02-2017 and time 21:33:25 (Italy) in region 3 km SW Fiastra (MC)

A magnitude ML 1.2 earthquake occured in region: 3 km SW Fiastra (MC), on

  • 20-02-2017 20:33:25 (UTC)
  • 20-02-2017 21:33:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0170, 13.1390 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Fiastra MC 3 559 559
Acquacanina MC 3 121 680
Fiordimonte MC 5 202 882
Pievebovigliana MC 7 866 1748
Bolognola MC 8 142 1890
Pieve Torina MC 8 1458 3348
Ussita MC 8 444 3792
Visso MC 10 1107 4899
Muccia MC 11 915 5814
Monte Cavallo MC 11 145 5959
Sarnano MC 13 3264 9223
Castelsantangelo sul Nera MC 14 281 9504
Cessapalombo MC 14 512 10016
Camerino MC 14 6974 16990
Caldarola MC 15 1823 18813
Serravalle di Chienti MC 16 1070 19883
Camporotondo di Fiastrone MC 17 563 20446
Gualdo MC 17 815 21261
Preci PG 17 724 21985
San Ginesio MC 18 3498 25483
Amandola FM 18 3629 29112
Belforte del Chienti MC 18 1886 30998
Serrapetrona MC 18 966 31964
Montefortino FM 19 1178 33142

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
61 Km NW of Teramo (54892 inhabitants)
62 Km E of Perugia (166134 inhabitants)
65 Km NE of Terni (111501 inhabitants)
74 Km SW of Ancona (100861 inhabitants)
77 Km N of L'Aquila (69753 inhabitants)
93 Km S of Fano (60888 inhabitants)
100 Km NW of Montesilvano (53738 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
Reviewed
Rev100 		ML 1.2 2017-02-20
20:33:25		 43.017 13.1387 9 2017-02-20
20:45:24		 Sala Sismica INGV-Roma 41393081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-02-20 20:33:25 ± 0.06
Latitude 43.0170 ± 0.0027
Longitude 13.1387 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 41393081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 283
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.08544
Epicentral distance of station farthest from the epicenter (degree) 0.29228
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 41393081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-02-20 20:45:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1215.EHZ. 2017-02-20T20:33:36.48 0.6 undecidable manual S 223 32.4453 50 -0.07 48
IV.T1241.EHZ. 2017-02-20T20:33:35.96 0.6 undecidable manual S 127 29.6481 107 0.18 47
IV.T1214.HNZ. 2017-02-20T20:33:35.62 0.6 undecidable manual S 169 29.1486 107 0.03 49
IV.T1212.EHZ. 2017-02-20T20:33:35.94 0.6 undecidable manual S 195 30.4473 50 -0.07 48
IV.CESI.HHN. 2017-02-20T20:33:32.56 0.6 undecidable manual S 266 19.0698 116 0.24 48
IV.T1212.EHZ. 2017-02-20T20:33:31.21 0.1 undecidable manual P 195 30.4473 50 -0.15 95
IV.T1215.EHZ. 2017-02-20T20:33:31.40 0.1 undecidable manual P 223 32.4453 50 -0.27 93
IV.T1241.EHZ. 2017-02-20T20:33:31.31 1.0 undecidable manual P 127 29.6481 107 0.09 24
IV.T1216.EHZ. 2017-02-20T20:33:31.80 0.6 undecidable manual S 215 17.0718 118 0.09 49
IV.SNTG.HHZ. 2017-02-20T20:33:31.89 0.1 undecidable manual P 329 30.8469 50 0.46 89
IV.T1214.HNZ. 2017-02-20T20:33:31.00 0.1 undecidable manual P 169 29.1486 107 -0.11 96
IV.CSP1.EHZ. 2017-02-20T20:33:29.49 0.6 undecidable manual S 33 9.879 133 -0.17 49
IV.T1220.EHZ. 2017-02-20T20:33:29.74 0.6 undecidable manual S 339 11.0778 129 -0.24 48
IV.CESI.HHN. 2017-02-20T20:33:29.29 0.1 undecidable manual P 266 19.0698 116 0.06 99
IV.T1219.EHZ. 2017-02-20T20:33:29.84 0.6 undecidable manual S 292 11.6772 128 -0.3 48
IV.FEMA.HNE. 2017-02-20T20:33:29.63 0.3 undecidable manual S 230 9.4794 134 0.08 75
IV.MC2.EHZ. 2017-02-20T20:33:28.16 0.1 undecidable manual P 161 12.3765 126 0.07 100
IV.T1216.EHZ. 2017-02-20T20:33:28.90 0.6 negative manual P 215 17.0718 118 0.02 50
IV.T1219.EHZ. 2017-02-20T20:33:27.92 0.3 negative manual P 292 11.6772 128 -0.05 75
IV.FEMA.HNE. 2017-02-20T20:33:27.76 0.1 undecidable manual P 230 9.4794 134 0.13 99
IV.CSP1.EHZ. 2017-02-20T20:33:27.70 0.3 positive manual P 33 9.879 133 0.01 76
IV.T1220.EHZ. 2017-02-20T20:33:27.79 0.6 negative manual P 339 11.0778 129 -0.09 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHE. ML:0.9 0.00010664999999999999 0.86 AML other m 2017-02-20T20:33:29.81
IV.CSP1.EHN. ML:1.0 0.00013450000000000002 0.68 AML other m 2017-02-20T20:33:30.49
IV.T1216.EHN. ML:1.0 0.00008845 0.92 AML other m 2017-02-20T20:33:32.89
IV.T1216.EHE. ML:1.1 0.00010334999999999999 0.98 AML other m 2017-02-20T20:33:33.87
IV.T1219.HNE. ML:1.3 0.00023449999999999998 0.3 AML other m 2017-02-20T20:33:30.27
IV.T1219.EHN. ML:1.4 0.00029949999999999996 0.2 AML other m 2017-02-20T20:33:30.11
IV.T1219.HNN. ML:1.4 0.000317 0.2 AML other m 2017-02-20T20:33:30.21
IV.T1219.EHE. ML:1.3 0.0002315 0.28 AML other m 2017-02-20T20:33:30.12
IV.T1220.EHE. ML:1.6 0.0005164999999999999 0.4 AML other m 2017-02-20T20:33:31.68
IV.T1220.EHN. ML:1.4 0.0003 0.44 AML other m 2017-02-20T20:33:32.10
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