Earthquake with magnitude of ML 1.1 on date 31-08-2019 and time 05:15:56 (Italy) in region 3 km SE Amatrice (RI)

A magnitude ML 1.1 earthquake occured in region: 3 km SE Amatrice (RI), on

  • 31-08-2019 03:15:56 (UTC)
  • 31-08-2019 05:15:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.62, 13.31 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 3 2657 2657
Campotosto AQ 8 542 3199
Accumoli RI 10 667 3866
Capitignano AQ 11 665 4531
Montereale AQ 12 2581 7112
Cittareale RI 13 482 7594
Crognaleto TE 16 1297 8891
Cortino TE 16 656 9547
Arquata del Tronto AP 18 1178 10725
Barete AQ 19 737 11462
Borbona RI 19 617 12079
Cagnano Amiterno AQ 19 1369 13448
Acquasanta Terme AP 19 2916 16364
Rocca Santa Maria TE 19 537 16901
Fano Adriano TE 20 296 17197
Pizzoli AQ 20 4326 21523

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km N of L'Aquila (69753 inhabitants)
32 Km W of Teramo (54892 inhabitants)
55 Km E of Terni (111501 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
70 Km W of Montesilvano (53738 inhabitants)
76 Km W of Pescara (121014 inhabitants)
76 Km W of Chieti (51815 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
84 Km NE of Tivoli (56533 inhabitants)
93 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 1.1 2019-08-31
03:15:56
42.62 13.31 12 2019-08-31
03:19:51
Sala Sismica INGV-Roma 71954361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-31 03:15:56 ± 0.07
Latitude 42.62 ± 0.00
Longitude 13.31 ± 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 71954361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 156
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 25
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.02158
Epicentral distance of station farthest from the epicenter (degree) 0.31746
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 71954361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-31 03:19:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2019-08-31T03:16:08.05 0.1 undecidable manual S 284 0.3175 93 -0.17 96
IV.MMO1.EHZ. 2019-08-31T03:16:07.47 0.1 undecidable manual S 2 0.2833 93 0.26 94
IV.GIGS.HHZ. 2019-08-31T03:16:06.14 0.1 undecidable manual S 130 0.2509 94 -0.13 97
IV.NRCA.HHZ. 2019-08-31T03:16:06.34 0.1 undecidable manual S 326 0.2617 94 -0.24 95
IV.TERO.HHZ. 2019-08-31T03:16:04.95 0.1 undecidable manual S 88 0.214 96 -0.22 95
IV.GAVE.EHZ. 2019-08-31T03:16:03.20 0.6 negative manual P 284 0.3175 93 -0.01 49
IV.MTRA.EHZ. 2019-08-31T03:16:03.27 0.1 undecidable manual S 24 0.1529 103 -0.12 98
IV.NRCA.HHZ. 2019-08-31T03:16:02.39 0.6 undecidable manual P 326 0.2617 94 0.13 48
IV.MMO1.EHZ. 2019-08-31T03:16:02.82 0.6 positive manual P 2 0.2833 93 0.2 47
IV.RM33.EHZ. 2019-08-31T03:16:02.57 0.1 undecidable manual S 214 0.1295 110 -0.15 99
IV.GIGS.HHZ. 2019-08-31T03:16:02.20 0.6 undecidable manual P 130 0.2509 94 0.12 48
IV.TERO.HHZ. 2019-08-31T03:16:01.71 0.1 positive manual P 88 0.214 96 0.26 95
IV.RM33.EHZ. 2019-08-31T03:16:00.19 0.1 positive manual P 214 0.1295 110 0.16 98
IV.MTRA.EHZ. 2019-08-31T03:16:00.48 0.6 undecidable manual P 24 0.1529 103 0.06 50
IV.SMA1.EHZ. 2019-08-31T03:16:00.44 0.1 undecidable manual S 49 0.0216 166 -0.13 100
IV.SMA1.EHZ. 2019-08-31T03:15:59.07 0.1 negative manual P 49 0.0216 166 0.28 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.5 0.000455 1.24 AML other m 2019-08-31T03:16:00.93
IV.SMA1.EHN. ML:1.3 0.000294 1.58 AML other m 2019-08-31T03:16:00.95
IV.RM33.EHN. ML:1.2 0.0001545 0.36 AML other m 2019-08-31T03:16:02.68
IV.RM33.EHE. ML:1.5 0.000275 1.82 AML other m 2019-08-31T03:16:02.04
IV.MTRA.EHN. ML:1.3 0.0001615 0.24 AML other m 2019-08-31T03:16:03.34
IV.MTRA.EHE. ML:1.2 0.0001275 0.54 AML other m 2019-08-31T03:16:03.50
IV.TERO.HHN. ML:1 6.63E-5 0.1 AML other m 2019-08-31T03:16:05.17
IV.TERO.HHE. ML:1 5.28E-5 0.16 AML other m 2019-08-31T03:16:05.17
IV.NRCA.HHN. ML:0.6 2.13E-5 0.66 AML other m 2019-08-31T03:16:06.61
IV.NRCA.HHE. ML:0.9 3.315E-5 1.08 AML other m 2019-08-31T03:16:08.06
IV.GAVE.EHN. ML:1 3.36E-5 1.06 AML other m 2019-08-31T03:16:09.04
IV.GAVE.EHE. ML:0.9 3.085E-5 0.58 AML other m 2019-08-31T03:16:09.60
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