Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 31-12-2016 and time 16:55:01 (UTC) in region 1 km SW Sassoferrato (AN)

A magnitude ML 1.6 earthquake occured in region: 1 km SW Sassoferrato (AN), on

  • 31-12-2016 16:55:01 (UTC)
  • 31-12-2016 17:55:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4300, 12.8480 at 14 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
Sassoferrato AN 1 7285 7285
Genga AN 7 1797 9082
Serra Sant'Abbondio PU 9 1027 10109
Arcevia AN 11 4612 14721
Fabriano AN 11 31480 46201
Frontone PU 13 1300 47501
Costacciaro PG 13 1216 48717
Serra San Quirico AN 14 2850 51567
Sigillo PG 14 2404 53971
Scheggia e Pascelupo PG 15 1393 55364
Pergola PU 15 6333 61697
Mergo AN 16 1037 62734
Cerreto d'Esi AN 16 3817 66551
Fossato di Vico PG 17 2840 69391
Cantiano PU 18 2245 71636
Rosora AN 19 1985 73621
Poggio San Vicino MC 20 246 73867
Serra de' Conti AN 20 3746 77613

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km SW of Fano (60888 inhabitants)
52 Km NE of Perugia (166134 inhabitants)
54 Km S of Pesaro (94582 inhabitants)
54 Km N of Foligno (57155 inhabitants)
58 Km W of Ancona (100861 inhabitants)
74 Km SE of Rimini (147750 inhabitants)
78 Km E of Arezzo (99543 inhabitants)
93 Km SE of Cesena (96758 inhabitants)
98 Km N of Terni (111501 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 		ML 1.6 2016-12-31
16:55:01		 43.4298 12.8482 14 2017-03-14
08:46:58		 Bollettino Sismico Italiano INGV 42382491
Reviewed
Rev100 		ML 1.6 2016-12-31
16:55:01		 43.4273 12.8493 14 2016-12-31
17:08:31		 Sala Sismica INGV-Roma 38155061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-12-31 16:55:01 ± 0.04
Latitude 43.4298 ± 0.0018
Longitude 12.8482 ± 0.0037
Depth (km) 14 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 42382491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 240
Semi-minor axis of confidence ellipse (meter) 134
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26800
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 42382491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-03-14 08:46:58

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 38155061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-12-31 17:08:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NDIM.HNZ. 2016-12-31T16:56:11.85 3.0 undecidable manual Sn -1.36 0
CH.MMK.HHZ. 2016-12-31T16:56:07.85 3.0 negative manual Pg 14.26 0
GU.SARM.EHZ. 2016-12-31T16:56:01.40 3.0 undecidable manual Sn 1.66 0
IV.SGRT.HHZ. 2016-12-31T16:55:39.52 3.0 undecidable manual Sn -3.2 0
IV.MNTV.HNZ. 2016-12-31T16:55:32.22 3.0 undecidable manual Pn 1.18 0
IV.SFI.EHZ. 2016-12-31T16:55:15.92 3.0 positive manual Pg 3.55 0
IV.FSSB.HHZ. 2016-12-31T16:55:12.44 0.3 undecidable manual S 349 29.748 100 0.06 72
IV.PIEI.HHZ. 2016-12-31T16:55:11.87 0.3 undecidable manual S 295 27.8499 101 0 73
IV.ATFO.HHZ. 2016-12-31T16:55:11.00 0.3 undecidable manual S 253 23.3544 105 0.28 69
IV.SNTG.HHZ. 2016-12-31T16:55:10.04 0.3 undecidable manual S 159 20.7681 109 -0.02 74
IV.MPAG.EHZ. 2016-12-31T16:55:10.75 0.3 undecidable manual S 342 23.2545 105 0.07 73
IV.EL6.EHZ. 2016-12-31T16:55:10.80 0.3 undecidable manual S 119 23.2545 105 0.1 72
BA.PZUN.HHZ. 2016-12-31T16:55:09.30 3.0 positive manual Pn -0.67 0
IV.FRON.EHZ. 2016-12-31T16:55:08.32 0.3 undecidable manual S 315 13.875 123 -0.07 74
IV.FOSV.EHZ. 2016-12-31T16:55:08.95 0.1 undecidable manual S 205 16.5723 117 -0.06 99
IV.EL6.EHZ. 2016-12-31T16:55:07.01 0.3 undecidable manual P 119 23.2545 105 0.03 73
IV.PIEI.HHZ. 2016-12-31T16:55:07.50 0.3 undecidable manual P 295 27.8499 101 -0.16 71
IV.FSSB.HHZ. 2016-12-31T16:55:07.93 0.1 undecidable manual P 349 29.748 100 -0.03 96
IV.ATFO.HHZ. 2016-12-31T16:55:07.11 0.3 undecidable manual P 253 23.3544 105 0.11 72
IV.SSFR.HHZ. 2016-12-31T16:55:06.79 0.1 undecidable manual S 278 5.3946 154 -0.1 100
IV.SNTG.HHZ. 2016-12-31T16:55:06.49 0.1 undecidable manual P 159 20.7681 109 -0.13 96
IV.MPAG.EHZ. 2016-12-31T16:55:06.96 0.3 undecidable manual P 342 23.2545 105 -0.01 73
IV.FOSV.EHZ. 2016-12-31T16:55:05.95 0.1 positive manual P 205 16.5723 117 -0.06 98
IV.FRON.EHZ. 2016-12-31T16:55:05.62 0.1 negative manual P 315 13.875 123 -0.03 99
IV.SSFR.HHZ. 2016-12-31T16:55:04.83 0.1 negative manual P 278 5.3946 154 0.05 100
IV.LIK.EHZ.01 2016-12-31T16:55:02.63 3.0 undecidable manual S -0.27 0
MN.AQU.HHZ. 2016-12-31T16:54:57.70 3.0 positive manual P 3.13 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FSSB.HHE. ML:1.4 0.00010415 0.86 AML other m 2016-12-31T16:55:13.46
IV.FSSB.HHN. ML:1.7 0.000217 0.42 AML other m 2016-12-31T16:55:13.07
IV.SSFR.HHE. ML:1.5 0.000368 0.2 AML other m 2016-12-31T16:55:07.57
IV.SSFR.HNE. ML:1.6 0.000531 0.52 AML other m 2016-12-31T16:55:07.47
IV.SSFR.HHN. ML:1.5 0.000404 0.18 AML other m 2016-12-31T16:55:06.98
IV.SSFR.HNN. ML:1.7 0.0005925 1.28 AML other m 2016-12-31T16:55:06.89
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