Earthquake with magnitude of ML 1.1 on date 20-02-2017 and time 22:44:00 (Italy) in region 5 km W Montegallo (AP)

A magnitude ML 1.1 earthquake occured in region: 5 km W Montegallo (AP), on

  • 20-02-2017 21:44:00 (UTC)
  • 20-02-2017 22:44:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8420, 13.2740 at 1 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montegallo AP 5 523 523
Montemonaco AP 8 604 1127
Arquata del Tronto AP 8 1178 2305
Castelsantangelo sul Nera MC 11 281 2586
Montefortino FM 13 1178 3764
Acquasanta Terme AP 14 2916 6680
Norcia PG 16 4957 11637
Ussita MC 16 444 12081
Palmiano AP 16 196 12277
Accumoli RI 16 667 12944
Roccafluvione AP 17 2010 14954
Amandola FM 17 3629 18583
Comunanza AP 17 3166 21749
Bolognola MC 17 142 21891
Visso MC 18 1107 22998
Venarotta AP 19 2066 25064
Preci PG 20 724 25788

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km NW of Teramo (54892 inhabitants)
48 Km E of Foligno (57155 inhabitants)
56 Km N of L'Aquila (69753 inhabitants)
60 Km NE of Terni (111501 inhabitants)
78 Km E of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
88 Km W of Pescara (121014 inhabitants)
89 Km S of Ancona (100861 inhabitants)
91 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 1.1 2017-02-20
21:44:00
42.8423 13.2738 1 2017-02-20
22:11:49
Sala Sismica INGV-Roma 41395901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-02-20 21:44:00 ± 0.22
Latitude 42.8423 ± 0.0072
Longitude 13.2738 ± 0.0147
Depth (km) 1 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 41395901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1330
Semi-minor axis of confidence ellipse (meter) 590
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 63
Circular confidence region, given by single value of horizontal uncertainty (meter) 1330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 210
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.29408
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 41395901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-02-20 22:11:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HHZ. 2017-02-20T21:44:25.04 3.0 undecidable manual Sg 0.28 0
IV.LNSS.HHZ. 2017-02-20T21:44:11.36 1.0 undecidable manual S 216 32.6451 91 -0.81 19
IV.SMA1.EHZ. 2017-02-20T21:44:08.80 0.6 undecidable manual S 168 24.0537 92 -0.37 46
IV.TERO.HHZ. 2017-02-20T21:44:07.51 3.0 positive manual P 0.53 0
IV.LNSS.HHZ. 2017-02-20T21:44:07.49 0.1 undecidable manual P 216 32.6451 91 0.12 96
IV.GIGS.HHZ. 2017-02-20T21:44:06.64 3.0 undecidable manual P -0.98 0
IV.T1299.EHZ. 2017-02-20T21:44:05.95 1.0 positive manual P 178 23.0547 92 0.5 22
IV.NRCA.HHZ. 2017-02-20T21:44:05.49 0.6 undecidable manual S 266 12.9759 93 0.14 49
IV.SMA1.EHZ. 2017-02-20T21:44:05.88 0.6 positive manual P 168 24.0537 92 0.24 47
IV.MC2.EHZ. 2017-02-20T21:44:04.21 0.6 undecidable manual S 318 10.2786 94 -0.2 49
IV.T1220.EHZ. 2017-02-20T21:44:04.93 3.0 positive manual P -0.33 0
IV.T1247.HHZ. 2017-02-20T21:44:04.81 3.0 positive manual P -0.83 0
IV.T1219.EHZ. 2017-02-20T21:44:04.50 3.0 negative manual P 0.09 0
IV.NRCA.HHZ. 2017-02-20T21:44:03.60 0.3 positive manual P 266 12.9759 93 0.16 74
IV.MC2.EHZ. 2017-02-20T21:44:02.82 0.1 negative manual P 318 10.2786 94 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:0.8 0.0000308 0.54 AML other m 2017-02-20T21:44:11.70
IV.LNSS.HHE. ML:0.8 0.00002965 1.02 AML other m 2017-02-20T21:44:12.88
IV.NRCA.HHN. ML:0.7 0.0000722 0.04 AML other m 2017-02-20T21:44:20.05
IV.NRCA.HHE. ML:1.0 0.00013000000000000002 0.34 AML other m 2017-02-20T21:44:20.16
IV.RM33.EHN. ML:1.4 0.0000915 0.94 AML other m 2017-02-20T21:44:06.86
IV.RM33.EHE. ML:1.4 0.0000881 0.98 AML other m 2017-02-20T21:44:06.99
IV.SMA1.EHN. ML:1.5 0.000227 1.64 AML other m 2017-02-20T21:44:08.15
IV.SMA1.EHE. ML:1.3 0.00014399999999999998 0.28 AML other m 2017-02-20T21:44:09.20
IV.T1247.HHN. ML:1.8 0.00022199999999999998 0.4 AML other m 2017-02-20T21:44:09.15
IV.T1247.HHE. ML:2.0 0.00029000000000000006 0.32 AML other m 2017-02-20T21:44:06.59
IV.TERO.HHE. ML:0.9 0.00003145 0.78 AML other m 2017-02-20T21:44:12.25
IV.TERO.HHN. ML:0.9 0.00002875 0.34 AML other m 2017-02-20T21:44:13.80
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download