Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 22-10-2019 and time 04:44:21 (Italy) in region 4 km SW Arquata del Tronto (AP)

A magnitude ML 1.1 earthquake occured in region: 4 km SW Arquata del Tronto (AP), on

  • 22-10-2019 02:44:21 (UTC)
  • 22-10-2019 04:44:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7550, 13.2560 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
Arquata del Tronto AP 4 1178 1178
Accumoli RI 7 667 1845
Montegallo AP 12 523 2368
Acquasanta Terme AP 13 2916 5284
Norcia PG 14 4957 10241
Amatrice RI 14 2657 12898
Cittareale RI 17 482 13380
Montemonaco AP 17 604 13984
Castelsantangelo sul Nera MC 18 281 14265

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Teramo (54892 inhabitants)
46 Km N of L'Aquila (69753 inhabitants)
50 Km E of Foligno (57155 inhabitants)
54 Km E of Terni (111501 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
81 Km E of Perugia (166134 inhabitants)
85 Km W of Pescara (121014 inhabitants)
87 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
98 Km S of Ancona (100861 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 2019-10-22
02:44:21		 42.7553 13.2555 11 2019-10-22
02:57:32		 Sala Sismica INGV-Roma 73383661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-22 02:44:21 ± 0.07
Latitude 42.7553 ± 0.0036
Longitude 13.2555 ± 0.0073
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 73383661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 567
Semi-minor axis of confidence ellipse (meter) 137
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.39480
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 73383661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-22 02:57:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.OFFI.HHZ. 2019-10-22T02:44:36.20 0.3 undecidable manual S 60 40.2264 50 1.83 32
IV.GIGS.HHZ. 2019-10-22T02:44:34.35 0.3 undecidable manual S 142 42.3243 50 -0.57 62
IV.CSP1.EHZ. 2019-10-22T02:44:33.52 0.3 undecidable manual S 354 37.5291 50 -0.12 70
IV.MF5.EHZ. 2019-10-22T02:44:32.30 0.3 undecidable manual S 33 30.6471 50 0.49 66
IV.FDMO.HHZ. 2019-10-22T02:44:32.47 0.3 undecidable manual S 336 34.0437 50 -0.24 69
IV.RM33.EHZ. 2019-10-22T02:44:31.10 0.3 undecidable manual S 187 27.5502 50 0.14 71
IV.TERO.HHZ. 2019-10-22T02:44:31.59 0.3 undecidable manual S 117 31.9458 50 -0.57 64
IV.FEMA.HNE. 2019-10-22T02:44:31.13 0.3 undecidable manual S 324 28.3494 50 -0.07 72
IV.LNSS.HHZ. 2019-10-22T02:44:30.40 0.3 undecidable manual S 226 24.3534 50 0.28 70
IV.OFFI.HHZ. 2019-10-22T02:44:29.31 0.1 undecidable manual P 60 40.2264 50 0.54 85
IV.MNTT.EHZ. 2019-10-22T02:44:29.74 0.3 undecidable manual P 39 43.8228 50 0.42 65
IV.MC2.EHZ. 2019-10-22T02:44:28.60 0.3 undecidable manual S 343 18.1707 50 0.14 72
IV.GIGS.HHZ. 2019-10-22T02:44:28.87 0.3 undecidable manual P 142 42.3243 50 -0.22 68
IV.CSP1.EHZ. 2019-10-22T02:44:28.02 0.1 undecidable manual P 354 37.5291 50 -0.33 90
IV.TERO.HHZ. 2019-10-22T02:44:27.07 0.1 undecidable manual P 117 31.9458 50 -0.42 89
IV.T1299.HNE. 2019-10-22T02:44:27.59 0.3 undecidable manual S 171 13.5753 129 0.43 69
IV.NRCA.HHZ. 2019-10-22T02:44:27.36 0.3 undecidable manual S 307 14.3745 127 -0.02 75
IV.FEMA.HNE. 2019-10-22T02:44:27.07 0.6 undecidable manual P 324 28.3494 50 0.13 48
IV.MF5.EHZ. 2019-10-22T02:44:27.35 0.1 undecidable manual P 33 30.6471 50 0.06 96
IV.SMA1.EHZ. 2019-10-22T02:44:27.60 0.3 undecidable manual S 155 15.2736 125 -0.03 74
IV.FDMO.HHZ. 2019-10-22T02:44:27.48 0.1 undecidable manual P 336 34.0437 50 -0.33 90
IV.MMO1.EHZ. 2019-10-22T02:44:27.81 0.3 undecidable manual S 20 16.9719 123 -0.32 70
IV.MTRA.HNZ. 2019-10-22T02:44:26.40 0.1 undecidable manual S 89 11.4774 133 -0.21 96
IV.LNSS.HHZ. 2019-10-22T02:44:26.36 0.1 undecidable manual P 226 24.3534 50 0.04 97
IV.RM33.EHZ. 2019-10-22T02:44:26.74 0.1 undecidable manual P 187 27.5502 50 -0.06 96
IV.MMO1.EHZ. 2019-10-22T02:44:25.01 0.1 undecidable manual P 20 16.9719 123 -0.15 97
IV.MC2.EHZ. 2019-10-22T02:44:25.31 0.1 undecidable manual P 343 18.1707 50 -0.05 99
IV.MTRA.HNZ. 2019-10-22T02:44:24.31 0.1 positive manual P 89 11.4774 133 0.02 100
IV.T1299.HNE. 2019-10-22T02:44:24.88 0.1 undecidable manual P 171 13.5753 129 0.27 95
IV.NRCA.HHZ. 2019-10-22T02:44:24.78 0.1 negative manual P 307 14.3745 127 0.04 99
IV.SMA1.EHZ. 2019-10-22T02:44:24.92 0.1 negative manual P 155 15.2736 125 0.04 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.2 0.000201 0.66 AML other m 2019-10-22T02:44:26.89
IV.MTRA.EHN. ML:1.2 0.00016599999999999997 0.44 AML other m 2019-10-22T02:44:26.48
IV.SMA1.EHN. ML:1.1 0.00010915 0.36 AML other m 2019-10-22T02:44:27.87
IV.SMA1.EHE. ML:1.1 0.00011049999999999999 0.42 AML other m 2019-10-22T02:44:27.56
IV.NRCA.HHE. ML:1.4 0.00023400000000000002 0.1 AML other m 2019-10-22T02:44:27.83
IV.NRCA.HHN. ML:1.3 0.000176 1.88 AML other m 2019-10-22T02:44:28.05
IV.RM33.EHN. ML:1.1 0.00006335 0.28 AML other m 2019-10-22T02:44:31.32
IV.LNSS.HHN. ML:1.2 0.00009755 0.68 AML other m 2019-10-22T02:44:31.63
IV.LNSS.HHE. ML:1.0 0.00005465 0.6 AML other m 2019-10-22T02:44:31.61
IV.TERO.HHN. ML:0.8 0.0000272 0.84 AML other m 2019-10-22T02:44:32.95
IV.RM33.EHE. ML:1.0 0.00005095 0.26 AML other m 2019-10-22T02:44:32.84
IV.FDMO.HHN. ML:1.1 0.000048349999999999996 0.22 AML other m 2019-10-22T02:44:32.77
IV.FDMO.HHE. ML:0.9 0.0000353 0.22 AML other m 2019-10-22T02:44:32.92
IV.TERO.HHE. ML:0.8 0.000027 0.96 AML other m 2019-10-22T02:44:33.98
IV.OFFI.HHN. ML:1.5 0.00010075000000000001 0.54 AML other m 2019-10-22T02:44:37.68
IV.OFFI.HHE. ML:1.4 0.00007919999999999999 1.5 AML other m 2019-10-22T02:44:38.93
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