Earthquake with magnitude of ML 1.8 on date 21-01-2017 and time 22:40:38 (Italy) in region 3 km SW Amatrice (RI)

A magnitude ML 1.8 earthquake occured in region: 3 km SW Amatrice (RI), on

  • 21-01-2017 21:40:38 (UTC)
  • 21-01-2017 22:40:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.61, 13.27 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.

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 3 2657 2657
Cittareale RI 9 482 3139
Montereale AQ 10 2581 5720
Accumoli RI 10 667 6387
Capitignano AQ 10 665 7052
Campotosto AQ 10 542 7594
Borbona RI 15 617 8211
Posta RI 17 694 8905
Cagnano Amiterno AQ 17 1369 10274
Barete AQ 18 737 11011
Arquata del Tronto AP 18 1178 12189
Crognaleto TE 19 1297 13486
Pizzoli AQ 19 4326 17812
Cortino TE 20 656 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
36 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
79 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
81 Km NE of Tivoli (56533 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
98 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 1.8 2017-01-21
21:40:38
42.61 13.27 11 2017-01-21
21:54:30
Sala Sismica INGV-Roma 39529841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-01-21 21:40:38 ± 0.11
Latitude 42.61 ± 0.01
Longitude 13.27 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 39529841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 665
Semi-minor axis of confidence ellipse (meter) 481
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
Circular confidence region, given by single value of horizontal uncertainty (meter) 670
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.27429
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 39529841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-01-21 21:54:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.OFFI.HHZ. 2017-01-21T21:40:48.21 3.0 negative manual P 0.56 0
IV.GIGS.HHZ. 2017-01-21T21:40:48.17 0.6 undecidable manual S 125 0.2743 91 -0.63 48
IV.T1222.EHZ. 2017-01-21T21:40:48.46 0.6 undecidable manual S 219 0.268 91 -0.17 53
IV.T1220.EHZ. 2017-01-21T21:40:48.55 3.0 positive manual P -0.34 0
IV.GUMA.HHZ. 2017-01-21T21:40:47.89 3.0 negative manual P 0.11 0
IV.FDMO.HHZ. 2017-01-21T21:40:47.40 3.0 undecidable manual P -0.19 0
IV.ARRO.EHZ. 2017-01-21T21:40:46.04 3.0 negative manual P -0.04 0
IV.T1247.HHZ. 2017-01-21T21:40:45.57 0.6 undecidable manual S 172 0.1691 92 -0.12 55
IV.T1216.EHZ. 2017-01-21T21:40:45.60 3.0 positive manual P 0.08 0
IV.LNSS.HHZ. 2017-01-21T21:40:45.55 0.6 undecidable manual S 268 0.1664 92 -0.07 55
IV.T1215.EHZ. 2017-01-21T21:40:45.55 3.0 undecidable manual P -0.22 0
IV.FIAM.HHZ. 2017-01-21T21:40:45.77 3.0 negative manual P -0.03 0
IV.MC2.EHZ. 2017-01-21T21:40:44.17 3.0 positive manual P -0.87 0
IV.GIGS.HHZ. 2017-01-21T21:40:44.14 0.6 positive manual P 125 0.2743 91 -0.19 53
IV.T1217.EHZ. 2017-01-21T21:40:44.41 3.0 positive manual P 0.17 0
IV.T1218.EHZ. 2017-01-21T21:40:44.23 0.6 undecidable manual S 299 0.1268 98 -0.21 53
IV.T1222.EHZ. 2017-01-21T21:40:44.15 0.3 positive manual P 219 0.268 91 -0.08 81
IV.T1247.HHZ. 2017-01-21T21:40:43.04 0.1 undecidable manual P 172 0.1691 92 0.5 100
IV.RM33.EHZ. 2017-01-21T21:40:43.70 0.6 undecidable manual S 201 0.1079 111 -0.18 54
IV.T1212.EHZ. 2017-01-21T21:40:43.35 3.0 negative manual P -0.01 0
IV.T1299.EHZ. 2017-01-21T21:40:42.15 0.6 undecidable manual S 24 0.027 160 -0.1 56
IV.LNSS.HHZ. 2017-01-21T21:40:42.60 0.3 positive manual P 268 0.1664 92 0.11 82
IV.RM33.EHZ. 2017-01-21T21:40:41.63 0.6 negative manual P 201 0.1079 111 0.14 55
IV.T1218.EHZ. 2017-01-21T21:40:41.89 0.3 negative manual P 299 0.1268 98 0.08 84
IV.T1299.EHZ. 2017-01-21T21:40:40.73 0.3 positive manual P 24 0.027 160 0.18 83
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.8 0.0005015 1.2 AML other m 2017-01-21T21:40:46.89
IV.LNSS.HHE. ML:1.7 0.000396 0.68 AML other m 2017-01-21T21:40:46.77
IV.RM33.HNE. ML:2.1 0.00144 0.1 AML other m 2017-01-21T21:40:44.05
IV.RM33.EHE. ML:2.1 0.00141 0.1 AML other m 2017-01-21T21:40:44.00
IV.RM33.HNN. ML:1.8 0.0007905 1.68 AML other m 2017-01-21T21:40:43.03
IV.RM33.EHN. ML:1.8 0.000775 1.68 AML other m 2017-01-21T21:40:43.03
IV.T1217.HNE. ML:1.4 0.0001223 1.06 AML other m 2017-01-21T21:40:49.74
IV.T1217.HNN. ML:1.4 0.00012685 1.16 AML other m 2017-01-21T21:40:51.24
IV.T1218.EHE. ML:1.6 0.000388 0.12 AML other m 2017-01-21T21:40:44.32
IV.T1218.EHN. ML:1.7 0.0004745 0.24 AML other m 2017-01-21T21:40:44.53
IV.T1299.HNE. ML:1.8 0.0011345 0.28 AML other m 2017-01-21T21:40:42.38
IV.T1299.EHE. ML:1.9 0.001152 0.28 AML other m 2017-01-21T21:40:42.38
IV.T1299.HNN. ML:1.8 0.000903 0.38 AML other m 2017-01-21T21:40:42.25
IV.T1299.EHN. ML:1.8 0.000909 0.38 AML other m 2017-01-21T21:40:42.25
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