Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 20-10-2019 and time 16:31:17 (UTC) in region 3 km S Treia (MC)

A magnitude ML 1.4 earthquake occured in region: 3 km S Treia (MC), on

  • 20-10-2019 16:31:17 (UTC)
  • 20-10-2019 18:31:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.29, 13.32 at 23 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
Treia MC 3 9403 9403
Pollenza MC 3 6618 16021
Appignano MC 9 4213 20234
Tolentino MC 9 20069 40303
Macerata MC 11 42473 82776
Urbisaglia MC 11 2628 85404
Cingoli MC 13 10352 95756
Montecassiano MC 13 7125 102881
San Severino Marche MC 13 12726 115607
Petriolo MC 14 1998 117605
Colmurano MC 14 1263 118868
Belforte del Chienti MC 15 1886 120754
Loro Piceno MC 16 2401 123155
Serrapetrona MC 16 966 124121
Corridonia MC 16 15430 139551
Ripe San Ginesio MC 17 852 140403
Filottrano AN 17 9499 149902
Montefano MC 17 3541 153443
Mogliano MC 18 4696 158139
Camporotondo di Fiastrone MC 18 563 158702
Caldarola MC 18 1823 160525
Apiro MC 19 2280 162805
Staffolo AN 19 2253 165058
San Ginesio MC 20 3498 168556
Massa Fermana FM 20 963 169519

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SW of Ancona (100861 inhabitants)
62 Km NE of Foligno (57155 inhabitants)
66 Km SE of Fano (60888 inhabitants)
76 Km SE of Pesaro (94582 inhabitants)
77 Km NW of Teramo (54892 inhabitants)
78 Km E of Perugia (166134 inhabitants)
98 Km NE of Terni (111501 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 1.4 2019-10-20
16:31:17		 43.29 13.32 23 2019-10-20
16:40:36		 Sala Sismica INGV-Roma 73358981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-20 16:31:17 ± 0.11
Latitude 43.29 ± 0.00
Longitude 13.32 ± 0.01
Depth (km) 23 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73358981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 109
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.61873
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 73358981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-20 16:40:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2019-10-20T16:32:03.45 3.0 undecidable manual S -0.27 0
IV.SRES.HHZ. 2019-10-20T16:31:41.39 3.0 negative manual P 0.57 0
IV.FDMO.HHZ. 2019-10-20T16:31:30.18 0.3 undecidable manual S 214 0.3022 117 0.12 73
IV.PIEI.HHZ. 2019-10-20T16:31:30.23 0.6 undecidable manual P 294 0.6187 102 0.19 45
IV.SNTG.HHZ. 2019-10-20T16:31:29.73 0.3 undecidable manual S 263 0.2761 120 0.36 70
IV.GUMA.HHZ. 2019-10-20T16:31:28.33 0.6 undecidable manual S 177 0.2266 126 0.19 48
IV.SAP2.EHZ. 2019-10-20T16:31:27.85 0.3 undecidable manual S 163 0.2014 130 0.31 71
IV.NRCA.HHZ. 2019-10-20T16:31:27.36 0.6 undecidable manual P 198 0.4784 106 -0.35 44
IV.EL6.EHZ. 2019-10-20T16:31:27.00 0.3 undecidable manual S 285 0.1619 137 0.31 72
IV.CSP1.EHZ. 2019-10-20T16:31:27.75 0.3 undecidable manual S 203 0.2131 128 -0.07 75
IV.MNTP.HNZ. 2019-10-20T16:31:27.59 0.1 undecidable manual S 144 0.188 132 0.35 94
IV.MC2.EHZ. 2019-10-20T16:31:26.06 0.3 undecidable manual P 194 0.3885 111 -0.19 70
IV.MDAR.HNZ. 2019-10-20T16:31:26.64 0.3 undecidable manual S 233 0.1592 137 0 77
IV.PF6.EHZ. 2019-10-20T16:31:26.73 0.3 undecidable manual S 211 0.1754 134 -0.24 73
IV.ARVD.HHZ. 2019-10-20T16:31:25.63 0.3 undecidable manual P 308 0.3435 114 0.09 73
IV.MF5.EHZ. 2019-10-20T16:31:25.12 0.3 undecidable manual P 161 0.3184 116 -0.02 74
IV.CING.HNZ. 2019-10-20T16:31:25.99 0.3 undecidable manual S 315 0.1241 145 0 77
IV.AOI.HHE. 2019-10-20T16:31:25.60 0.3 undecidable manual P 38 0.3336 114 0.23 70
IV.FDMO.HHZ. 2019-10-20T16:31:24.71 0.1 undecidable manual P 214 0.3022 117 -0.19 95
IV.SNTG.HHZ. 2019-10-20T16:31:24.68 0.1 undecidable manual P 263 0.2761 120 0.18 97
IV.MNTT.EHZ. 2019-10-20T16:31:24.88 0.6 undecidable manual P 138 0.304 117 -0.05 49
IV.TRE1.HNZ. 2019-10-20T16:31:24.45 0.3 undecidable manual S 353 0.0225 173 -0.44 73
IV.CSP1.EHZ. 2019-10-20T16:31:23.40 0.3 undecidable manual P 203 0.2131 128 -0.2 73
IV.MNTP.HNZ. 2019-10-20T16:31:23.15 0.3 undecidable manual P 144 0.188 132 -0.12 75
IV.SAP2.EHZ. 2019-10-20T16:31:23.36 0.6 undecidable manual P 163 0.2014 130 -0.09 50
IV.EL6.EHZ. 2019-10-20T16:31:23.05 0.3 undecidable manual P 285 0.1619 137 0.1 75
IV.GUMA.HHZ. 2019-10-20T16:31:23.84 0.1 undecidable manual P 177 0.2266 126 0.05 100
IV.MDAR.HNZ. 2019-10-20T16:31:22.83 0.6 undecidable manual P 233 0.1592 137 -0.09 50
IV.PF6.EHZ. 2019-10-20T16:31:22.82 0.3 undecidable manual P 211 0.1754 134 -0.29 72
IV.CING.HNZ. 2019-10-20T16:31:22.47 0.3 undecidable manual P 315 0.1241 145 -0.08 76
IV.TRE1.HNZ. 2019-10-20T16:31:21.65 0.3 undecidable manual P 353 0.0225 173 -0.26 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EL6.EHN. ML:1.6 0.0002315 0.6 AML other m 2019-10-20T16:31:27.39
IV.EL6.EHE. ML:1.7 0.0002865 0.14 AML other m 2019-10-20T16:31:27.52
IV.SNTG.HHN. ML:1.4 8.905E-5 0.52 AML other m 2019-10-20T16:31:30.53
IV.SNTG.HHE. ML:1.2 5.595E-5 0.12 AML other m 2019-10-20T16:31:30.41
IV.FDMO.HHE. ML:1.2 4.95E-5 0.86 AML other m 2019-10-20T16:31:30.80
IV.FDMO.HHN. ML:1.1 4.035E-5 0.62 AML other m 2019-10-20T16:31:31.64
IV.MNTT.EHE. ML:1.7 0.0001815 0.58 AML other m 2019-10-20T16:31:31.78
IV.ARVD.HHN. ML:0.8 2.01E-5 0.6 AML other m 2019-10-20T16:31:31.65
IV.ARVD.HHE. ML:0.9 2.56E-5 0.62 AML other m 2019-10-20T16:31:32.26
IV.MNTT.EHN. ML:1.7 0.0001789 1 AML other m 2019-10-20T16:31:33.87
IV.NRCA.HHN. ML:1.4 5.12E-5 0.68 AML other m 2019-10-20T16:31:36.59
IV.NRCA.HHE. ML:1.4 5.465E-5 1.3 AML other m 2019-10-20T16:31:38.99
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