Earthquake with magnitude of ML 1.7 on date 16-09-2021 and time 00:19:51 (Italy) in region 8 km W Arquata del Tronto (AP)

A magnitude ML 1.7 earthquake occured in region: 8 km W Arquata del Tronto (AP), on

  • 15-09-2021 22:19:51 (UTC)
  • 16-09-2021 00:19:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.79, 13.207 at 9 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
Arquata del Tronto AP 8 1178 1178
Norcia PG 9 4957 6135
Accumoli RI 11 667 6802
Montegallo AP 12 523 7325
Castelsantangelo sul Nera MC 13 281 7606
Montemonaco AP 16 604 8210
Acquasanta Terme AP 17 2916 11126
Preci PG 17 724 11850
Cascia PG 18 3217 15067
Ussita MC 18 444 15511
Visso MC 18 1107 16618
Amatrice RI 19 2657 19275
Cittareale RI 20 482 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
45 Km E of Foligno (57155 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
52 Km E of Terni (111501 inhabitants)
75 Km E of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
95 Km S of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km NE of Tivoli (56533 inhabitants)
99 Km E of Viterbo (67173 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
Reviewed
Rev100
ML 1.7 2021-09-15
22:19:51
42.7902 13.207 9 2021-09-15
22:26:02
Sala Sismica INGV-Roma 95481661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-15 22:19:51 ± 0.06
Latitude 42.7902 ± 0.0027
Longitude 13.2070 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95481661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 325
Semi-minor axis of confidence ellipse (meter) 155
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 305
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30847
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 51
Type of magnitude ML
Reference to an origin 95481661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-15 22:26:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IMTC.HHZ. 2021-09-15T22:20:28.14 3.0 undecidable manual Pg 1.91 0
IV.CAFI.HNZ. 2021-09-15T22:20:24.61 3.0 undecidable manual S -2.8 0
IV.ARVD.HHZ. 2021-09-15T22:20:17.29 3.0 undecidable manual S -0.05 0
IV.EL6.EHZ. 2021-09-15T22:20:11.01 3.0 undecidable manual S -0.17 0
IV.FIAM.HHZ. 2021-09-15T22:20:09.69 3.0 undecidable manual S -0.53 0
IV.NARO.HHZ. 2021-09-15T22:20:09.65 3.0 positive manual P 0.05 0
IV.COR1.EHZ. 2021-09-15T22:20:08.64 3.0 undecidable manual P 0.54 0
IV.ARVD.HHZ. 2021-09-15T22:20:05.38 3.0 undecidable manual P -0.46 0
IV.SSFR.HHZ. 2021-09-15T22:20:05.61 3.0 positive manual P 0.12 0
IV.T0110.HHZ. 2021-09-15T22:20:04.68 3.0 positive manual P -0.54 0
IV.MURB.HHZ. 2021-09-15T22:20:04.32 3.0 undecidable manual P -0.57 0
IV.GUMA.HHZ. 2021-09-15T22:20:03.08 0.6 undecidable manual S 19 0.2878 105 0.51 41
IV.FAGN.HHZ. 2021-09-15T22:20:03.41 3.0 negative manual P 0.21 0
IV.ATCC.EHZ. 2021-09-15T22:20:02.64 3.0 negative manual P -0.12 0
IV.MF5.EHZ. 2021-09-15T22:20:02.25 0.6 undecidable manual S 43 0.2707 106 0.33 45
IV.CESI.HHZ. 2021-09-15T22:20:02.97 0.6 undecidable manual S 314 0.3085 50 -0.23 48
IV.CING.HHZ. 2021-09-15T22:20:02.71 3.0 negative manual P -0.43 0
IV.EL6.EHZ. 2021-09-15T22:20:02.11 3.0 undecidable manual P -0.27 0
IV.FDMO.HHZ. 2021-09-15T22:20:01.26 0.3 undecidable manual S 340 0.2617 107 -0.32 68
IV.ASSB.HHZ. 2021-09-15T22:20:00.83 3.0 positive manual P -0.09 0
IV.GAVE.EHZ. 2021-09-15T22:20:00.99 0.3 undecidable manual S 247 0.2491 107 -0.15 71
IV.MNTT.EHZ. 2021-09-15T22:20:00.03 3.0 positive manual P 0.32 0
IV.LNSS.HHZ. 2021-09-15T22:20:00.39 0.6 undecidable manual S 213 0.2239 109 0.2 47
IV.OFFI.HHZ. 2021-09-15T22:19:59.77 3.0 positive manual P 0.31 0
IV.MML1.EHZ. 2021-09-15T22:19:58.91 3.0 negative manual P -0.09 0
IV.SAP2.EHZ. 2021-09-15T22:19:58.77 3.0 negative manual P 0.15 0
IV.MTRA.EHZ. 2021-09-15T22:19:57.06 0.3 undecidable manual S 103 0.143 119 -0.29 70
IV.RM33.EHZ. 2021-09-15T22:19:57.32 3.0 negative manual P 0 0
IV.TERO.HHZ. 2021-09-15T22:19:57.90 3.0 undecidable manual P -0.66 0
IV.GUMA.HHZ. 2021-09-15T22:19:57.69 0.3 positive manual P 19 0.2878 105 -0.02 72
IV.MF5.EHZ. 2021-09-15T22:19:57.44 0.1 positive manual P 43 0.2707 106 0.1 95
IV.MMO1.EHZ. 2021-09-15T22:19:57.08 0.3 undecidable manual S 39 0.1403 119 -0.17 71
IV.CESI.HHZ. 2021-09-15T22:19:57.86 0.3 undecidable manual P 314 0.3085 50 -0.21 71
IV.CSP1.EHZ. 2021-09-15T22:19:57.61 3.0 positive manual P -0.28 0
IV.LNSS.HHZ. 2021-09-15T22:19:56.39 0.3 positive manual P 213 0.2239 109 0.05 73
IV.MC2.EHZ. 2021-09-15T22:19:56.88 0.3 undecidable manual S 354 0.1223 123 0.23 73
IV.FDMO.HHZ. 2021-09-15T22:19:56.96 0.1 undecidable manual P 340 0.2617 107 -0.18 94
IV.GAVE.EHZ. 2021-09-15T22:19:56.91 0.1 positive manual P 247 0.2491 107 0.02 97
IV.NRCA.HNZ. 2021-09-15T22:19:55.43 0.3 undecidable manual S 303 0.0809 134 0.03 75
IV.SMA1.EHZ. 2021-09-15T22:19:55.51 0.1 undecidable manual P 149 0.1853 113 -0.03 99
IV.MMO1.EHZ. 2021-09-15T22:19:54.66 0.1 undecidable manual P 39 0.1403 119 0.02 100
IV.MTRA.EHZ. 2021-09-15T22:19:54.76 0.1 undecidable manual P 103 0.143 119 0.06 99
IV.MC2.EHZ. 2021-09-15T22:19:54.57 0.3 positive manual P 354 0.1223 123 0.28 72
IV.NRCA.HNZ. 2021-09-15T22:19:53.80 0.1 undecidable manual P 303 0.0809 134 0.23 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.1 0.00195 0.22 AML other m 2021-09-15T22:19:55.89
IV.NRCA.HHE. ML:2.2 0.002105 0.24 AML other m 2021-09-15T22:19:55.77
IV.NRCA.HHN. ML:2.1 0.002095 0.12 AML other m 2021-09-15T22:19:56.56
IV.NRCA.HNN. ML:2.1 0.00198 0.1 AML other m 2021-09-15T22:19:56.51
IV.MTRA.EHN. ML:1.6 0.0003765 1.56 AML other m 2021-09-15T22:19:58.03
IV.MTRA.EHE. ML:1.7 0.000456 0.88 AML other m 2021-09-15T22:19:58.53
IV.SMA1.EHN. ML:1.5 0.0002315 0.18 AML other m 2021-09-15T22:19:58.68
IV.LNSS.HHE. ML:1.9 0.000479 0.48 AML other m 2021-09-15T22:20:01.27
IV.GAVE.EHE. ML:1.8 0.00032 0.96 AML other m 2021-09-15T22:20:01.50
IV.FDMO.HHN. ML:1.7 0.0002735 0.22 AML other m 2021-09-15T22:20:01.61
IV.FDMO.HHE. ML:1.6 0.0001975 0.22 AML other m 2021-09-15T22:20:01.61
IV.LNSS.HHN. ML:1.9 0.000527 0.16 AML other m 2021-09-15T22:20:01.68
IV.GAVE.EHN. ML:1.7 0.0002725 0.12 AML other m 2021-09-15T22:20:02.53
IV.RM33.EHN. ML:1.6 0.0002005 0.58 AML other m 2021-09-15T22:20:02.78
IV.RM33.EHE. ML:1.6 0.0001905 0.88 AML other m 2021-09-15T22:20:02.92
IV.MF5.EHE. ML:1.8 0.000281 0.32 AML other m 2021-09-15T22:20:03.15
IV.CESI.HHN. ML:1.8 0.0002425 0.28 AML other m 2021-09-15T22:20:03.43
IV.CSP1.EHN. ML:2.1 0.0005565 0.48 AML other m 2021-09-15T22:20:03.09
IV.CESI.HHE. ML:1.5 0.000121 0.58 AML other m 2021-09-15T22:20:03.82
IV.MF5.EHN. ML:1.6 0.000204 0.54 AML other m 2021-09-15T22:20:03.33
IV.GUMA.HHN. ML:2 0.0004515 0.44 AML other m 2021-09-15T22:20:03.65
IV.GUMA.HNN. ML:2 0.000525 0.56 AML other m 2021-09-15T22:20:03.63
IV.CSP1.EHE. ML:2 0.000448 0.32 AML other m 2021-09-15T22:20:03.76
IV.GUMA.HHE. ML:2 0.000527 0.26 AML other m 2021-09-15T22:20:04.20
IV.GUMA.HNE. ML:2 0.000454 1.5 AML other m 2021-09-15T22:20:05.80
IV.SAP2.EHN. ML:2.6 0.001665 0.12 AML other m 2021-09-15T22:20:05.13
IV.SAP2.EHE. ML:1.7 0.000199 1.26 AML other m 2021-09-15T22:20:05.83
IV.MML1.EHE. ML:1.4 9.56E-5 0.42 AML other m 2021-09-15T22:20:05.12
IV.MML1.EHN. ML:1.5 0.00010315 0.48 AML other m 2021-09-15T22:20:06.28
IV.OFFI.HHN. ML:1.8 0.0001965 0.64 AML other m 2021-09-15T22:20:07.72
IV.OFFI.HHE. ML:1.6 0.0001175 1.12 AML other m 2021-09-15T22:20:07.13
IV.ASSB.HHE. ML:1.4 5.545E-5 0.22 AML other m 2021-09-15T22:20:08.58
IV.MNTT.EHE. ML:1.9 0.000267 0.3 AML other m 2021-09-15T22:20:09.48
IV.ASSB.HHN. ML:1.4 6.485E-5 0.18 AML other m 2021-09-15T22:20:09.87
IV.MNTT.EHN. ML:2 0.000273 0.42 AML other m 2021-09-15T22:20:10.41
IV.FIAM.HHE. ML:1.1 2.685E-5 0.68 AML other m 2021-09-15T22:20:10.50
IV.FIAM.HHN. ML:1.2 2.835E-5 0.54 AML other m 2021-09-15T22:20:10.92
IV.ATCC.EHN. ML:1.3 3.85E-5 0.64 AML other m 2021-09-15T22:20:13.06
IV.CING.HHE. ML:1.5 5.745E-5 1.08 AML other m 2021-09-15T22:20:13.98
IV.CING.HHN. ML:1.3 3.705E-5 0.14 AML other m 2021-09-15T22:20:13.57
IV.ATCC.EHE. ML:1.4 4.825E-5 1.36 AML other m 2021-09-15T22:20:14.76
IV.FAGN.HHE. ML:1.6 7.66E-5 1.04 AML other m 2021-09-15T22:20:14.13
IV.FAGN.HHN. ML:1.6 7.105E-5 0.64 AML other m 2021-09-15T22:20:16.02
IV.MURB.HHE. ML:1.7 7.38E-5 0.24 AML other m 2021-09-15T22:20:16.74
IV.SSFR.HHN. ML:1.7 6.835E-5 0.7 AML other m 2021-09-15T22:20:17.34
IV.SSFR.HHE. ML:1.8 9.52E-5 0.16 AML other m 2021-09-15T22:20:17.70
IV.T0110.HHN. ML:1.4 3.8E-5 0.64 AML other m 2021-09-15T22:20:18.64
IV.T0110.HHE. ML:1.4 4.14E-5 0.48 AML other m 2021-09-15T22:20:18.34
IV.MURB.HHN. ML:1.7 7.1E-5 0.56 AML other m 2021-09-15T22:20:18.17
IV.GAVE.HNE. ML:1.8 0.0003018846 0.1792 AML other m 2021-09-15T22:20:03.24
IV.TERO.HHN. ML:1.8 0.00023643055 0.1024 AML other m 2021-09-15T22:20:03.62
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