Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 31-01-2017 and time 18:03:35 (Italy) in region 4 km W Montemonaco (AP)

A magnitude ML 1.3 earthquake occured in region: 4 km W Montemonaco (AP), on

  • 31-01-2017 17:03:35 (UTC)
  • 31-01-2017 18:03:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8970, 13.2770 at 19 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
Montemonaco AP 4 604 604
Montefortino FM 7 1178 1782
Montegallo AP 8 523 2305
Castelsantangelo sul Nera MC 10 281 2586
Amandola FM 11 3629 6215
Bolognola MC 12 142 6357
Ussita MC 12 444 6801
Comunanza AP 13 3166 9967
Arquata del Tronto AP 14 1178 11145
Palmiano AP 15 196 11341
Sarnano MC 16 3264 14605
Visso MC 16 1107 15712
Roccafluvione AP 17 2010 17722
Acquacanina MC 17 121 17843
Venarotta AP 18 2066 19909
Acquasanta Terme AP 18 2916 22825
Montefalcone Appennino FM 18 424 23249
Smerillo FM 18 365 23614
Fiastra MC 18 559 24173
Norcia PG 19 4957 29130
Force AP 19 1354 30484
Preci PG 19 724 31208
Gualdo MC 20 815 32023

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NW of Teramo (54892 inhabitants)
47 Km E of Foligno (57155 inhabitants)
61 Km N of L'Aquila (69753 inhabitants)
64 Km NE of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
83 Km S of Ancona (100861 inhabitants)
83 Km NW of Montesilvano (53738 inhabitants)
90 Km NW of Pescara (121014 inhabitants)
95 Km NW of Chieti (51815 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 1.3 2017-01-31
17:03:35		 42.8968 13.2767 19 2017-01-31
17:14:31		 Sala Sismica INGV-Roma 40246691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-01-31 17:03:35 ± 0.09
Latitude 42.8968 ± 0.0027
Longitude 13.2767 ± 0.0049
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 40246691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 438
Semi-minor axis of confidence ellipse (meter) 121
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
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) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39031
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 40246691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-01-31 17:14:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2017-01-31T17:03:50.41 0.6 undecidable manual S 187 43.3233 105 0.39 43
IV.CAMP.HHZ. 2017-01-31T17:03:49.53 0.6 undecidable manual S 165 41.5251 106 -0.01 47
IV.T1218.EHZ. 2017-01-31T17:03:46.52 0.6 undecidable manual S 208 28.3494 115 0.26 46
IV.T1220.EHZ. 2017-01-31T17:03:46.35 0.6 undecidable manual S 327 28.1496 115 0.15 48
IV.T1219.EHZ. 2017-01-31T17:03:46.25 0.6 undecidable manual S 309 28.2495 115 0.02 49
IV.T1212.EHZ. 2017-01-31T17:03:45.39 0.6 undecidable manual S 230 24.8529 119 -0.02 49
IV.GUMA.HHZ. 2017-01-31T17:03:44.42 0.6 undecidable manual S 14 18.9699 128 0.3 46
IV.FDMO.HHZ. 2017-01-31T17:03:44.42 0.6 undecidable manual S 315 21.867 123 -0.31 46
IV.CAMP.HHZ. 2017-01-31T17:03:43.39 0.1 undecidable manual P 165 41.5251 106 -0.3 90
IV.RM33.EHZ. 2017-01-31T17:03:43.96 0.6 undecidable manual P 187 43.3233 105 -0.01 47
IV.TERO.HHZ. 2017-01-31T17:03:43.36 0.6 positive manual P 139 40.4262 106 -0.18 46
IV.MC2.EHZ. 2017-01-31T17:03:41.86 0.6 undecidable manual S 283 7.2927 156 -0.31 48
IV.T1212.EHZ. 2017-01-31T17:03:41.33 0.1 undecidable manual P 230 24.8529 119 0.02 98
IV.T1299.EHZ. 2017-01-31T17:03:41.94 3.0 undecidable manual P 0.21 0
IV.T1218.EHZ. 2017-01-31T17:03:41.80 0.1 undecidable manual P 208 28.3494 115 0 97
IV.T1220.EHZ. 2017-01-31T17:03:41.75 0.1 undecidable manual P 327 28.1496 115 -0.01 96
IV.T1219.EHZ. 2017-01-31T17:03:41.78 0.1 undecidable manual P 309 28.2495 115 0 97
IV.GUMA.HHZ. 2017-01-31T17:03:40.70 0.1 undecidable manual P 14 18.9699 128 0.14 96
IV.FDMO.HHZ. 2017-01-31T17:03:40.83 0.1 undecidable manual P 315 21.867 123 -0.09 96
IV.MC2.EHZ. 2017-01-31T17:03:39.37 0.1 undecidable manual P 283 7.2927 156 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAMP.HHE. ML:1.1 0.000034200000000000005 0.22 AML other m 2017-01-31T17:03:50.14
IV.CAMP.HHN. ML:1.3 0.00006055 1.6 AML other m 2017-01-31T17:03:50.11
IV.FDMO.HHN. ML:1.2 0.0000736 1.56 AML other m 2017-01-31T17:03:44.83
IV.FDMO.HHE. ML:1.0 0.00005885 0.96 AML other m 2017-01-31T17:03:45.56
IV.GUMA.HHE. ML:1.3 0.0001255 0.72 AML other m 2017-01-31T17:03:46.79
IV.GUMA.HHN. ML:1.2 0.0001008 0.56 AML other m 2017-01-31T17:03:47.16
IV.RM33.EHE. ML:1.1 0.0000393 1.4 AML other m 2017-01-31T17:03:50.87
IV.RM33.EHN. ML:1.2 0.000048100000000000004 0.58 AML other m 2017-01-31T17:03:51.69
IV.SNTG.HHE. ML:1.1 0.00002925 1.34 AML other m 2017-01-31T17:03:53.74
IV.SNTG.HHN. ML:1.1 0.00003175 1.3 AML other m 2017-01-31T17:03:53.08
IV.T1212.EHN. ML:1.2 0.000075465 0.22 AML other m 2017-01-31T17:03:45.66
IV.T1212.EHE. ML:1.2 0.00008315 0.2 AML other m 2017-01-31T17:03:45.67
IV.T1218.EHN. ML:1.4 0.00012140000000000001 0.16 AML other m 2017-01-31T17:03:46.80
IV.T1218.EHE. ML:1.2 0.0000666 1.2 AML other m 2017-01-31T17:03:46.79
IV.T1220.EHN. ML:1.9 0.0003235 0.24 AML other m 2017-01-31T17:03:47.84
IV.T1220.EHE. ML:1.6 0.00015900000000000002 1.22 AML other m 2017-01-31T17:03:48.82
IV.T1299.EHE. ML:1.6 0.00015 0.68 AML other m 2017-01-31T17:03:44.07
IV.T1299.EHN. ML:1.4 0.000113 0.14 AML other m 2017-01-31T17:03:44.07
IV.TERO.HHN. ML:1.5 0.00009434999999999999 1.48 AML other m 2017-01-31T17:03:49.88
IV.TERO.HHE. ML:1.4 0.00007189999999999999 1.08 AML other m 2017-01-31T17:03:50.31
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