Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 21-09-2019 and time 17:32:43 (UTC) in region 2 km NW Montegallo (AP)

A magnitude ML 0.4 earthquake occured in region: 2 km NW Montegallo (AP), on

  • 21-09-2019 17:32:43 (UTC)
  • 21-09-2019 19:32:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8530, 13.3120 at 11 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 2 523 523
Montemonaco AP 6 604 1127
Arquata del Tronto AP 9 1178 2305
Montefortino FM 10 1178 3483
Acquasanta Terme AP 12 2916 6399
Palmiano AP 13 196 6595
Roccafluvione AP 13 2010 8605
Castelsantangelo sul Nera MC 14 281 8886
Comunanza AP 14 3166 12052
Amandola FM 15 3629 15681
Venarotta AP 15 2066 17747
Bolognola MC 17 142 17889
Ussita MC 17 444 18333
Accumoli RI 18 667 19000
Norcia PG 19 4957 23957
Force AP 19 1354 25311
Montefalcone Appennino FM 19 424 25735
Valle Castellana TE 20 977 26712

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of Teramo (54892 inhabitants)
51 Km E of Foligno (57155 inhabitants)
56 Km N of L'Aquila (69753 inhabitants)
63 Km NE of Terni (111501 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
80 Km E of Perugia (166134 inhabitants)
86 Km NW of Pescara (121014 inhabitants)
87 Km S of Ancona (100861 inhabitants)
90 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 0.4 2019-09-21
17:32:43		 42.8528 13.3118 11 2019-09-21
18:33:37		 Sala Sismica INGV-Roma 72622111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-21 17:32:43 ± 0.05
Latitude 42.8528 ± 0.0027
Longitude 13.3118 ± 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 72622111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 397
Semi-minor axis of confidence ellipse (meter) 274
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 14
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) 0.25091
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 72622111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-21 18:33:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZONE.HHZ. 2019-09-21T17:34:22.59 3.0 undecidable manual Sn -1.09 0
IV.ILLI.HHZ. 2019-09-21T17:34:00.13 3.0 negative manual Pg 8.19 0
IV.CGL.BHZ. 2019-09-21T17:33:59.20 3.0 undecidable manual Pn 6.91 0
GU.RNCA.HHZ. 2019-09-21T17:33:50.14 3.0 negative manual Pg 12.59 0
IV.FIR.HHZ. 2019-09-21T17:33:40.39 3.0 undecidable manual Sg 4.31 0
IV.IMOL.HNZ. 2019-09-21T17:33:39.83 3.0 undecidable manual Sn 0.53 0
IV.CIGN.HHZ. 2019-09-21T17:33:36.24 3.0 undecidable manual Sg 1.19 0
IV.SLCN.HHZ. 2019-09-21T17:33:30.24 3.0 undecidable manual Pn -0.36 0
IV.LRP.EHZ. 2019-09-21T17:33:22.96 3.0 undecidable manual S -0.57 0
IV.CPGN.EHZ. 2019-09-21T17:33:21.46 3.0 undecidable manual S -0.83 0
IV.RMP.HHZ. 2019-09-21T17:33:20.83 3.0 undecidable manual S -0.3 0
IT.ORP.HGZ. 2019-09-21T17:33:18.07 3.0 positive manual Pn -0.58 0
IV.FOSV.EHZ. 2019-09-21T17:33:04.36 3.0 undecidable manual S -0.09 0
IV.MOMA.HHZ. 2019-09-21T17:32:54.41 3.0 undecidable manual P 0.25 0
IV.FDMO.HHZ. 2019-09-21T17:32:53.01 0.3 undecidable manual S 318 27.3504 50 -0.16 76
IV.CSP1.EHZ. 2019-09-21T17:32:53.33 0.3 undecidable manual S 342 27.8499 50 0.01 75
IV.SMA1.EHZ. 2019-09-21T17:32:52.46 0.3 undecidable manual S 176 24.753 50 -0.01 75
IV.MF5.EHZ. 2019-09-21T17:32:51.28 0.3 undecidable manual S 39 19.1697 119 0.29 73
IV.TERO.HHZ. 2019-09-21T17:32:50.44 3.0 undecidable manual P -0.09 0
IV.NRCA.HNZ. 2019-09-21T17:32:50.29 0.3 undecidable manual S 262 16.1727 124 0.18 73
IV.MTRA.EHZ. 2019-09-21T17:32:49.03 0.3 undecidable manual S 147 12.6762 130 -0.1 77
IV.FDMO.HHZ. 2019-09-21T17:32:48.90 0.3 undecidable manual P 318 27.3504 50 -0.12 76
IV.CSP1.EHZ. 2019-09-21T17:32:48.92 0.1 undecidable manual P 342 27.8499 50 -0.19 100
IV.SMA1.EHZ. 2019-09-21T17:32:48.58 0.3 undecidable manual P 176 24.753 50 -0.04 76
IV.MF5.EHZ. 2019-09-21T17:32:47.92 0.3 undecidable manual P 39 19.1697 119 0.16 75
IV.MMO1.EHZ. 2019-09-21T17:32:47.37 0.3 undecidable manual S 13 5.2947 154 -0.15 77
IV.NRCA.HNZ. 2019-09-21T17:32:47.49 0.3 undecidable manual P 262 16.1727 124 0.24 73
IV.MTRA.EHZ. 2019-09-21T17:32:46.66 0.3 undecidable manual P 147 12.6762 130 -0.03 78
IV.MMO1.EHZ. 2019-09-21T17:32:45.79 0.3 undecidable manual P 13 5.2947 154 0.03 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:0.4 0.000023956415 0.0896 AML other m 2019-09-21T17:32:49.02
IV.MTRA.EHN. ML:0.4 0.000024452175 0.2048 AML other m 2019-09-21T17:32:49.53
IV.SMA1.EHE. ML:0.5 0.0000178740075 0.1536 AML other m 2019-09-21T17:32:52.63
IV.SMA1.EHN. ML:0.5 0.000021390955 0.2304 AML other m 2019-09-21T17:32:52.52
IV.FDMO.HHE. ML:0.3 0.000010284940500000001 0.1664 AML other m 2019-09-21T17:32:53.27
IV.FDMO.HHN. ML:0.3 0.000009520397999999999 0.1792 AML other m 2019-09-21T17:32:53.50
IV.TERO.HHE. ML:0.6 0.00001299463 0.1408 AML other m 2019-09-21T17:32:56.10
IV.TERO.HHN. ML:0.4 0.000010550755000000001 0.0768 AML other m 2019-09-21T17:32:55.83
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