Earthquake with magnitude of ML 0.9 on date 21-02-2017 and time 23:17:46 (Italy) in region 2 km E Amatrice (RI)

A magnitude ML 0.9 earthquake occured in region: 2 km E Amatrice (RI), on

  • 21-02-2017 22:17:46 (UTC)
  • 21-02-2017 23:17:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.64, 13.32 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
Amatrice RI 2 2657 2657
Accumoli RI 9 667 3324
Campotosto AQ 10 542 3866
Capitignano AQ 13 665 4531
Cittareale RI 13 482 5013
Montereale AQ 14 2581 7594
Arquata del Tronto AP 15 1178 8772
Cortino TE 16 656 9428
Crognaleto TE 17 1297 10725
Acquasanta Terme AP 17 2916 13641
Rocca Santa Maria TE 18 537 14178
Valle Castellana TE 19 977 15155

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km W of Teramo (54892 inhabitants)
32 Km N of L'Aquila (69753 inhabitants)
56 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
70 Km W of Montesilvano (53738 inhabitants)
76 Km W of Pescara (121014 inhabitants)
77 Km W of Chieti (51815 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
92 Km SE of Perugia (166134 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 0.9 2017-02-21
22:17:46
42.64 13.32 9 2017-02-21
22:28:54
Sala Sismica INGV-Roma 41448941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-02-21 22:17:46 ± 0.08
Latitude 42.64 ± 0.00
Longitude 13.32 ± 0.00
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 41448941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 333
Semi-minor axis of confidence ellipse (meter) 259
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 210
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
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 21
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24731
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 41448941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-02-21 22:28:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MC2.EHZ. 2017-02-21T22:17:57.92 3.0 undecidable manual S -0.07 0
IV.T1215.EHZ. 2017-02-21T22:17:54.42 3.0 positive manual P -0.03 0
IV.T1211.EHZ. 2017-02-21T22:17:53.94 3.0 positive manual P -0.32 0
IV.T1217.EHZ. 2017-02-21T22:17:52.90 3.0 positive manual P -0.17 0
IV.T1246.HHZ. 2017-02-21T22:17:52.69 0.1 undecidable manual S 113 0.1394 119 0 99
IV.MMO1.EHZ. 2017-02-21T22:17:52.55 3.0 positive manual P 0.14 0
IV.NRCA.HHZ. 2017-02-21T22:17:52.28 0.1 undecidable manual P 323 0.2473 108 -0.01 97
IV.T1247.HHZ. 2017-02-21T22:17:51.66 3.0 negative manual P 0.39 0
IV.T1241.EHZ. 2017-02-21T22:17:51.94 0.1 undecidable manual P 21 0.2347 108 -0.09 95
IV.TERO.HHZ. 2017-02-21T22:17:51.40 0.1 positive manual P 94 0.2104 110 -0.13 95
IV.T1212.EHZ. 2017-02-21T22:17:51.81 3.0 negative manual P -0.08 0
IV.LNSS.HHZ. 2017-02-21T22:17:51.36 3.0 negative manual P -0.12 0
IV.CAMP.HHZ. 2017-02-21T22:17:51.94 0.1 undecidable manual S 146 0.1214 123 -0.16 96
IV.T1218.EHZ. 2017-02-21T22:17:50.33 0.1 undecidable manual P 283 0.1529 117 -0.02 98
IV.RM33.EHZ. 2017-02-21T22:17:50.27 0.1 undecidable manual P 211 0.1484 118 0 99
IV.T1246.HHZ. 2017-02-21T22:17:50.24 0.1 undecidable manual P 113 0.1394 119 0.15 96
IV.CAMP.HHZ. 2017-02-21T22:17:49.79 0.1 undecidable manual P 146 0.1214 123 0.05 99
IV.T1299.EHZ. 2017-02-21T22:17:49.54 0.1 undecidable manual S 264 0.0261 161 -0.18 98
IV.SMA1.EHZ. 2017-02-21T22:17:49.67 0.1 undecidable manual S 117 0.0144 170 0.07 100
IV.SMA1.EHZ. 2017-02-21T22:17:48.50 0.1 positive manual P 117 0.0144 170 0.2 97
IV.T1299.EHZ. 2017-02-21T22:17:48.48 0.1 undecidable manual P 264 0.0261 161 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAMP.HHN. ML:0.7 5.125E-5 0.22 AML other m 2017-02-21T22:17:52.03
IV.CAMP.HHE. ML:1 0.0001206 0.22 AML other m 2017-02-21T22:17:52.10
IV.LNSS.HHN. ML:0.9 5.4E-5 0.32 AML other m 2017-02-21T22:17:56.55
IV.LNSS.HHE. ML:0.7 3.175E-5 0.8 AML other m 2017-02-21T22:17:58.25
IV.NRCA.HHN. ML:1.1 7.445E-5 0.14 AML other m 2017-02-21T22:18:08.19
IV.NRCA.HHE. ML:1.3 0.00010085 0.4 AML other m 2017-02-21T22:18:08.15
IV.RM33.EHE. ML:0.7 5.22E-5 0.64 AML other m 2017-02-21T22:17:53.18
IV.RM33.EHN. ML:0.9 6.825E-5 0.3 AML other m 2017-02-21T22:17:53.87
IV.T1241.EHE. ML:0.5 2.195E-5 0.9 AML other m 2017-02-21T22:17:57.55
IV.T1241.EHN. ML:0.6 2.435E-5 0.72 AML other m 2017-02-21T22:17:56.58
IV.T1247.HHN. ML:1.1 8.375E-5 0.54 AML other m 2017-02-21T22:17:54.69
IV.T1247.HHE. ML:1.1 8.435E-5 0.62 AML other m 2017-02-21T22:17:55.38
IV.T1299.EHE. ML:0 0.000674 0.08 AML other m 2017-02-21T22:17:49.60
IV.T1299.HNE. ML:0 0.0006645 0.08 AML other m 2017-02-21T22:17:49.60
IV.T1299.HNN. ML:0 0.0007695 0.1 AML other m 2017-02-21T22:17:49.56
IV.T1299.EHN. ML:0 0.000778 0.1 AML other m 2017-02-21T22:17:49.61
IV.TERO.HHE. ML:1.1 8.585E-5 0.32 AML other m 2017-02-21T22:17:55.18
IV.TERO.HHN. ML:1.3 0.000136 0.12 AML other m 2017-02-21T22:17:55.26
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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