Earthquake with magnitude of ML 1.1 on date 22-02-2017 and time 00:35:40 (Italy) in region 5 km SW Amatrice (RI)

A magnitude ML 1.1 earthquake occured in region: 5 km SW Amatrice (RI), on

  • 21-02-2017 23:35:40 (UTC)
  • 22-02-2017 00:35:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.61, 13.24 at 12 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
Amatrice RI 5 2657 2657
Cittareale RI 7 482 3139
Montereale AQ 9 2581 5720
Accumoli RI 10 667 6387
Capitignano AQ 11 665 7052
Campotosto AQ 12 542 7594
Borbona RI 14 617 8211
Posta RI 15 694 8905
Cagnano Amiterno AQ 16 1369 10274
Barete AQ 18 737 11011
Arquata del Tronto AP 19 1178 12189
Pizzoli AQ 19 4326 16515

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
38 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
59 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
80 Km NE of Tivoli (56533 inhabitants)
81 Km W of Chieti (51815 inhabitants)
81 Km W of Pescara (121014 inhabitants)
89 Km SE of Perugia (166134 inhabitants)
96 Km E of Viterbo (67173 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 1.1 2017-02-21
23:35:40
42.61 13.24 12 2017-02-21
23:44:10
Sala Sismica INGV-Roma 41451241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-02-21 23:35:40 ± 0.04
Latitude 42.61 ± 0.00
Longitude 13.24 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 41451241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 317
Semi-minor axis of confidence ellipse (meter) 145
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 200
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) 73
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35343
Number of stations at which the event was observed 17
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 8
Type of magnitude ML
Reference to an origin 41451241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-02-21 23:44:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2017-02-21T23:35:50.54 0.1 undecidable manual S 337 0.2455 95 -0.07 97
IV.T1212.EHN. 2017-02-21T23:35:49.26 0.1 undecidable manual S 315 0.2059 97 -0.17 95
IV.ARRO.EHZ. 2017-02-21T23:35:48.34 1.0 negative manual P 266 0.3534 93 0.02 24
IV.T1246.HHZ. 2017-02-21T23:35:48.55 0.1 undecidable manual S 97 0.1844 99 -0.26 94
IV.LNSS.HHZ. 2017-02-21T23:35:47.87 0.1 undecidable manual S 269 0.1502 105 0.06 100
IV.MMO1.EHZ. 2017-02-21T23:35:47.50 0.6 positive manual P 12 0.2986 93 0.11 48
IV.T1241.EHN. 2017-02-21T23:35:47.15 0.1 undecidable manual P 29 0.2842 94 0 97
IV.T1211.EHZ. 2017-02-21T23:35:47.31 0.1 undecidable manual P 256 0.2959 93 -0.03 96
IV.T1218.EHZ. 2017-02-21T23:35:46.71 0.1 undecidable manual S 304 0.1133 117 -0.09 99
IV.T1217.EHZ. 2017-02-21T23:35:46.63 0.1 undecidable manual P 295 0.2527 95 0.03 98
IV.TERO.HHZ. 2017-02-21T23:35:46.69 0.1 positive manual P 86 0.2653 94 -0.13 95
IV.NRCA.HHZ. 2017-02-21T23:35:46.57 0.6 positive manual P 337 0.2455 95 0.08 49
IV.RM33.EHZ. 2017-02-21T23:35:46.25 0.1 undecidable manual S 193 0.1007 123 -0.21 97
IV.T1222.EHZ. 2017-02-21T23:35:46.65 0.3 undecidable manual P 217 0.2563 94 -0.02 73
IV.T1214.EHZ. 2017-02-21T23:35:45.20 3.0 undecidable manual P 0.19 0
IV.T1246.HHZ. 2017-02-21T23:35:45.50 0.3 undecidable manual P 97 0.1844 99 0.05 74
IV.T1212.EHN. 2017-02-21T23:35:45.84 0.1 undecidable manual P 315 0.2059 97 0.04 99
IV.T1299.EHZ. 2017-02-21T23:35:45.03 0.1 undecidable manual S 46 0.0396 155 -0.24 98
IV.SMA1.EHZ. 2017-02-21T23:35:45.87 0.1 undecidable manual S 71 0.071 137 0.07 100
IV.LNSS.HHZ. 2017-02-21T23:35:45.00 0.1 positive manual P 269 0.1502 105 0.13 98
IV.SMA1.EHZ. 2017-02-21T23:35:44.00 0.1 positive manual P 71 0.071 137 0.29 96
IV.RM33.EHZ. 2017-02-21T23:35:44.22 0.1 positive manual P 193 0.1007 123 0.13 99
IV.T1218.EHZ. 2017-02-21T23:35:44.38 0.3 positive manual P 304 0.1133 117 0.09 75
IV.CAMP.HHE. 2017-02-21T23:35:44.92 0.3 undecidable manual P 120 0.1403 108 0.2 73
IV.T1299.EHZ. 2017-02-21T23:35:43.55 0.1 negative manual P 46 0.0396 155 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.1 9.55E-5 0.76 AML other m 2017-02-21T23:35:47.95
IV.LNSS.HHE. ML:0.9 7.165E-5 1.32 AML other m 2017-02-21T23:35:48.19
IV.NRCA.HHE. ML:1 4.77E-5 1.42 AML other m 2017-02-21T23:35:50.85
IV.NRCA.HHN. ML:0.9 4.03E-5 1.48 AML other m 2017-02-21T23:35:51.15
IV.RM33.EHE. ML:1.2 0.0001835 0.64 AML other m 2017-02-21T23:35:46.37
IV.RM33.EHN. ML:1.3 0.000204 0.12 AML other m 2017-02-21T23:35:46.52
IV.SMA1.EHN. ML:1.4 0.000285 1.64 AML other m 2017-02-21T23:35:46.07
IV.SMA1.EHE. ML:1.6 0.000489 1.54 AML other m 2017-02-21T23:35:46.19
IV.T1211.EHN. ML:1.2 5.815E-5 0.72 AML other m 2017-02-21T23:35:52.80
IV.T1211.EHE. ML:1 4.15E-5 0.66 AML other m 2017-02-21T23:35:53.61
IV.T1218.EHE. ML:1 8.811E-5 0.16 AML other m 2017-02-21T23:35:46.71
IV.T1218.EHN. ML:1.3 0.0001865 0.18 AML other m 2017-02-21T23:35:46.87
IV.T1299.EHE. ML:1.2 0.0002155 0.3 AML other m 2017-02-21T23:35:45.22
IV.T1299.EHN. ML:1.1 0.0001875 0.98 AML other m 2017-02-21T23:35:45.07
IV.TERO.HHE. ML:0.8 2.89E-5 0.7 AML other m 2017-02-21T23:35:51.91
IV.TERO.HHN. ML:0.8 3.065E-5 1.28 AML other m 2017-02-21T23:35:52.78
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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