Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 04-04-2017 and time 19:26:56 (Italy) in region 3 km E Preci (PG)

A magnitude ML 0.9 earthquake occured in region: 3 km E Preci (PG), on

  • 04-04-2017 17:26:56 (UTC)
  • 04-04-2017 19:26:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8800, 13.0810 at 10 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
Preci PG 3 724 724
Visso MC 6 1107 1831
Castelsantangelo sul Nera MC 6 281 2112
Ussita MC 9 444 2556
Norcia PG 10 4957 7513
Sellano PG 13 1079 8592
Monte Cavallo MC 14 145 8737
Cerreto di Spoleto PG 15 1075 9812
Bolognola MC 18 142 9954
Fiordimonte MC 18 202 10156
Acquacanina MC 18 121 10277
Fiastra MC 19 559 10836
Pieve Torina MC 19 1458 12294
Cascia PG 19 3217 15511

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
57 Km W of Teramo (54892 inhabitants)
62 Km E of Perugia (166134 inhabitants)
64 Km NW of L'Aquila (69753 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
95 Km NE of Viterbo (67173 inhabitants)
96 Km W 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 0.9 2017-04-04
17:26:56		 42.8802 13.0812 11 2017-04-04
17:33:00		 Sala Sismica INGV-Roma 43382561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-04-04 17:26:56 ± 0.06
Latitude 42.8802 ± 0.0027
Longitude 13.0812 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 43382561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 410
Semi-minor axis of confidence ellipse (meter) 229
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 12
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) 0.28688
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 43382561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-04-04 17:33:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HHZ. 2017-04-04T17:27:11.79 3.0 negative manual P -0.51 0
IV.T1299.EHZ. 2017-04-04T17:27:07.73 0.3 undecidable manual S 149 31.8459 50 -0.04 72
IV.T1217.EHZ. 2017-04-04T17:27:05.33 0.3 undecidable manual S 213 22.2555 50 0.11 71
IV.TERO.HHZ. 2017-04-04T17:27:05.63 3.0 negative manual P -0.44 0
IV.T1219.EHZ. 2017-04-04T17:27:04.28 0.3 undecidable manual S 342 20.4684 117 -0.39 69
IV.T1214.EHZ. 2017-04-04T17:27:03.39 0.3 undecidable manual S 142 16.9719 122 -0.21 73
IV.FDMO.HHZ. 2017-04-04T17:27:03.84 0.3 undecidable manual S 2 17.3715 121 0.11 74
IV.T1299.EHZ. 2017-04-04T17:27:03.08 0.1 undecidable manual P 149 31.8459 50 0 97
IV.T1245.HHZ. 2017-04-04T17:27:01.51 0.3 undecidable manual S 107 9.0798 139 0.01 76
IV.T1219.EHZ. 2017-04-04T17:27:01.34 0.1 undecidable manual P 342 20.4684 117 0.05 99
IV.T1217.EHZ. 2017-04-04T17:27:01.61 0.1 undecidable manual P 213 22.2555 50 -0.01 98
IV.T1214.EHZ. 2017-04-04T17:27:00.64 0.1 undecidable manual P 142 16.9719 122 -0.04 100
IV.FDMO.HHZ. 2017-04-04T17:27:00.88 0.1 undecidable manual P 2 17.3715 121 0.13 98
IV.T1245.HHZ. 2017-04-04T17:26:59.62 0.1 undecidable manual P 107 9.0798 139 0.15 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.6 0.00003275 0.32 AML other m 2017-04-04T17:27:03.99
IV.FDMO.HHE. ML:0.7 0.0000387 0.94 AML other m 2017-04-04T17:27:04.52
IV.T1214.EHN. ML:0.9 0.00006903072 0.7936 AML other m 2017-04-04T17:27:04.15
IV.T1216.EHN. ML:1.0 0.00017400000000000003 0.06 AML other m 2017-04-04T17:27:02.25
IV.T1245.HHE. ML:1.0 0.0001315 1.08 AML other m 2017-04-04T17:27:01.75
IV.T1245.HHN. ML:1.1 0.0001495 1.28 AML other m 2017-04-04T17:27:02.90
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