Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 23-09-2019 and time 08:21:18 (Italy) in region 4 km NW Torricella Sicura (TE)

A magnitude ML 1.7 earthquake occured in region: 4 km NW Torricella Sicura (TE), on

  • 23-09-2019 06:21:18 (UTC)
  • 23-09-2019 08:21:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.68, 13.62 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
Torricella Sicura TE 4 2641 2641
Rocca Santa Maria TE 7 537 3178
Teramo TE 7 54892 58070
Campli TE 8 7209 65279
Montorio al Vomano TE 11 8218 73497
Cortino TE 11 656 74153
Civitella del Tronto TE 11 5116 79269
Valle Castellana TE 12 977 80246
Basciano TE 13 2434 82680
Tossicia TE 15 1406 84086
Fano Adriano TE 15 296 84382
Canzano TE 16 1934 86316
Penna Sant'Andrea TE 16 1698 88014
Colledara TE 16 2179 90193
Folignano AP 16 9241 99434
Castellalto TE 16 7513 106947
Castel Castagna TE 17 500 107447
Bellante TE 17 7152 114599
Cermignano TE 17 1649 116248
Pietracamela TE 18 271 116519
Crognaleto TE 18 1297 117816
Maltignano AP 18 2401 120217
Sant'Egidio alla Vibrata TE 18 9811 130028
Sant'Omero TE 20 5243 135271
Isola del Gran Sasso d'Italia TE 20 4773 140044
Acquasanta Terme AP 20 2916 142960
Ascoli Piceno AP 20 49407 192367

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km W of Teramo (54892 inhabitants)
40 Km NE of L'Aquila (69753 inhabitants)
47 Km W of Montesilvano (53738 inhabitants)
54 Km W of Pescara (121014 inhabitants)
58 Km NW of Chieti (51815 inhabitants)
80 Km E of Terni (111501 inhabitants)
81 Km E of Foligno (57155 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.7 2019-09-23
06:21:18		 42.68 13.62 19 2019-09-23
06:29:48		 Sala Sismica INGV-Roma 72684921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-23 06:21:18 ± 0.1
Latitude 42.68 ± 0.00
Longitude 13.62 ± 0.01
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 72684921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 663
Semi-minor axis of confidence ellipse (meter) 251
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 67
Circular confidence region, given by single value of horizontal uncertainty (meter) 660
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.46315
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 72684921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-23 06:29:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PTRJ.HHZ. 2019-09-23T06:22:06.29 3.0 undecidable manual Sg 3.65 0
IV.BRIS.HHZ. 2019-09-23T06:21:50.78 3.0 undecidable manual Pn -0.14 0
IV.SGG.HHZ. 2019-09-23T06:21:43.84 3.0 undecidable manual P 1.62 0
IV.T0110.HHZ. 2019-09-23T06:21:35.44 0.6 undecidable manual S 165 0.4632 101 0.33 43
IV.MOMA.HHZ. 2019-09-23T06:21:34.72 3.0 negative manual P 1.44 0
IV.NRCA.HHZ. 2019-09-23T06:21:33.47 0.6 undecidable manual S 293 0.4011 103 0.16 46
IV.MC2.EHZ. 2019-09-23T06:21:33.72 0.6 undecidable manual S 307 0.3921 104 0.68 40
IV.VVLD.HHZ. 2019-09-23T06:21:33.98 3.0 undecidable manual P 0.18 0
IV.VCEL.EHZ. 2019-09-23T06:21:31.55 0.6 undecidable manual S 150 0.3274 107 0.35 44
IV.MF5.EHZ. 2019-09-23T06:21:31.85 0.6 undecidable manual S 340 0.331 107 0.55 43
IV.RM33.EHE. 2019-09-23T06:21:31.85 0.6 undecidable manual S 241 0.3408 106 0.25 45
IV.MMO1.EHZ. 2019-09-23T06:21:30.54 0.6 undecidable manual S 316 0.3076 109 -0.11 47
IV.GIGS.HHZ. 2019-09-23T06:21:28.34 0.3 undecidable manual S 188 0.2266 117 -0.1 72
IV.FDMO.HHZ. 2019-09-23T06:21:28.93 3.0 positive manual P -0.31 0
IV.T0110.HHZ. 2019-09-23T06:21:28.15 0.6 undecidable manual P 165 0.4632 101 -0.04 46
IV.CSP1.EHZ. 2019-09-23T06:21:28.67 3.0 negative manual P -0.38 0
IV.CAMP.HHE. 2019-09-23T06:21:28.12 0.6 undecidable manual S 227 0.2086 120 0.14 47
IV.SMA1.EHZ. 2019-09-23T06:21:28.30 0.6 undecidable manual S 257 0.2131 119 0.22 47
IV.RM33.EHE. 2019-09-23T06:21:27.10 1.0 undecidable manual P 241 0.3408 106 0.94 18
IV.MTRA.HNZ. 2019-09-23T06:21:27.06 0.3 undecidable manual S 296 0.1808 125 -0.2 71
IV.MNTT.EHZ. 2019-09-23T06:21:27.66 3.0 negative manual P 0.58 0
IV.MC2.EHZ. 2019-09-23T06:21:26.77 0.1 undecidable manual P 307 0.3921 104 -0.23 90
IV.NRCA.HHZ. 2019-09-23T06:21:26.91 0.3 undecidable manual P 293 0.4011 103 -0.24 67
IV.MMO1.EHZ. 2019-09-23T06:21:25.31 0.3 undecidable manual P 316 0.3076 109 -0.3 67
IV.VCEL.EHZ. 2019-09-23T06:21:25.82 0.3 undecidable manual P 150 0.3274 107 -0.11 70
IV.OFFI.HHZ. 2019-09-23T06:21:25.25 0.6 negative manual P 11 0.2617 113 0.37 45
IV.MF5.EHZ. 2019-09-23T06:21:25.96 0.3 undecidable manual P 340 0.331 107 -0.03 71
IV.SMA1.EHZ. 2019-09-23T06:21:24.18 0.1 undecidable manual P 257 0.2131 119 0.05 97
IV.TERO.HHZ. 2019-09-23T06:21:24.83 0.3 undecidable manual S 191 0.0558 159 -0.08 75
IV.GIGS.HHZ. 2019-09-23T06:21:24.09 0.1 undecidable manual P 188 0.2266 117 -0.25 93
IV.CAMP.HHE. 2019-09-23T06:21:24.04 0.1 undecidable manual P 227 0.2086 120 -0.03 97
IV.MTRA.HNZ. 2019-09-23T06:21:23.41 0.1 undecidable manual P 296 0.1808 125 -0.25 93
IV.TERO.HHZ. 2019-09-23T06:21:22.24 0.1 undecidable manual P 191 0.0558 159 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:2.2 0.001545 0.14 AML other m 2019-09-23T06:21:24.86
IV.TERO.HNN. ML:1.9 0.000779 1.68 AML other m 2019-09-23T06:21:24.86
IV.TERO.HHE. ML:2.2 0.00129 0.18 AML other m 2019-09-23T06:21:25.05
IV.TERO.HNE. ML:1.9 0.0006541 1.62 AML other m 2019-09-23T06:21:25.05
IV.MTRA.EHN. ML:1.8 0.0003315 0.32 AML other m 2019-09-23T06:21:27.25
IV.MTRA.EHE. ML:1.7 0.0002635 0.16 AML other m 2019-09-23T06:21:27.64
IV.GIGS.HHE. ML:0.9 4.24E-5 0.28 AML other m 2019-09-23T06:21:28.44
IV.GIGS.HHN. ML:1 4.9E-5 0.34 AML other m 2019-09-23T06:21:28.50
IV.VCEL.EHN. ML:1.6 0.0001321 1.36 AML other m 2019-09-23T06:21:31.04
IV.NRCA.HHN. ML:1.6 0.000125 0.1 AML other m 2019-09-23T06:21:34.07
IV.NRCA.HHE. ML:1.7 0.0001325 0.1 AML other m 2019-09-23T06:21:34.12
IV.VCEL.EHE. ML:1.6 0.000139 0.78 AML other m 2019-09-23T06:21:34.47
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download