Earthquake with magnitude of ML 1.0 on date 21-08-2019 and time 13:17:23 (Italy) in region 3 km SW Accumoli (RI)

A magnitude ML 1.0 earthquake occured in region: 3 km SW Accumoli (RI), on

  • 21-08-2019 11:17:23 (UTC)
  • 21-08-2019 13:17:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.67, 13.23 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
Accumoli RI 3 667 667
Amatrice RI 7 2657 3324
Cittareale RI 8 482 3806
Arquata del Tronto AP 12 1178 4984
Montereale AQ 17 2581 7565
Norcia PG 17 4957 12522
Campotosto AQ 17 542 13064
Capitignano AQ 18 665 13729
Cascia PG 18 3217 16946
Acquasanta Terme AP 18 2916 19862
Borbona RI 20 617 20479
Posta RI 20 694 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
84 Km SE of Perugia (166134 inhabitants)
84 Km W of Pescara (121014 inhabitants)
85 Km W of Chieti (51815 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 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 1.0 2019-08-21
11:17:23
42.67 13.23 11 2019-08-21
11:26:52
Sala Sismica INGV-Roma 71675691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-21 11:17:23 ± 0.1
Latitude 42.67 ± 0.01
Longitude 13.23 ± 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 71675691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 731
Semi-minor axis of confidence ellipse (meter) 509
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 178
Circular confidence region, given by single value of horizontal uncertainty (meter) 730
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50002
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 71675691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-21 11:26:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SPS2.HHZ. 2019-08-21T11:19:10.97 3.0 undecidable manual Sn -3.47 0
IV.MAGA.HHZ. 2019-08-21T11:18:59.50 3.0 undecidable manual Sn -0.95 0
GU.RRL.HHZ. 2019-08-21T11:18:55.79 3.0 undecidable manual Pg 16.370001 0
CH.DAVOX.HHZ. 2019-08-21T11:18:40.14 3.0 undecidable manual Pn 6.65 0
IV.RESU.HHZ. 2019-08-21T11:18:36.04 3.0 negative manual Pn -2.68 0
IV.FIU.EHZ. 2019-08-21T11:18:29.85 3.0 undecidable manual Sn 0.79 0
IV.CET2.HHZ. 2019-08-21T11:18:28.93 3.0 undecidable manual Pg 8.05 0
ST.RONC.EHZ. 2019-08-21T11:18:18.46 3.0 undecidable manual Pn -1.97 0
IV.PTRJ.HHZ. 2019-08-21T11:18:13.36 3.0 undecidable manual Sn -0.22 0
IT.VNF1.HGZ. 2019-08-21T11:18:06.80 3.0 undecidable manual Sg 0.27 0
IV.CSNT.HHZ. 2019-08-21T11:17:51.07 3.0 negative manual Pn 0.35 0
IV.RIBO.EHZ.01 2019-08-21T11:17:49.74 3.0 negative manual Pn -1.08 0
IV.PE3.EHZ. 2019-08-21T11:17:43.26 3.0 negative manual P -0.88 0
IV.MOMA.HHE. 2019-08-21T11:17:42.03 0.6 undecidable manual S 285 0.5 90 0.81 38
IV.MOMA.HHE. 2019-08-21T11:17:34.95 0.3 undecidable manual P 285 0.5 90 1.03 51
IV.TERO.HHZ. 2019-08-21T11:17:34.34 0.3 undecidable manual S 100 0.2806 90 -0.37 67
IV.MMO1.HNZ. 2019-08-21T11:17:33.52 0.3 undecidable manual S 18 0.2365 90 0.12 73
IV.GAVE.EHZ. 2019-08-21T11:17:33.44 0.3 undecidable manual S 274 0.2464 90 -0.25 70
IV.NRCA.HHZ. 2019-08-21T11:17:31.49 0.3 undecidable manual S 332 0.1799 91 -0.24 72
IV.FDMO.HHE. 2019-08-21T11:17:31.01 0.6 undecidable manual P 344 0.3768 90 -0.79 39
IV.CAMP.HHZ. 2019-08-21T11:17:31.80 0.3 undecidable manual S 136 0.1916 91 -0.27 70
IV.LNSS.HHZ. 2019-08-21T11:17:30.66 0.3 undecidable manual S 243 0.1556 91 -0.34 70
IV.MTRA.EHZ. 2019-08-21T11:17:30.63 0.3 undecidable manual S 56 0.1484 91 -0.17 74
IV.TERO.HHZ. 2019-08-21T11:17:30.00 0.6 undecidable manual P 100 0.2806 90 -0.16 47
IV.SMA1.EHZ. 2019-08-21T11:17:29.48 0.6 undecidable manual S 119 0.0899 120 0.36 47
IV.CAMP.HHZ. 2019-08-21T11:17:29.01 0.3 undecidable manual P 136 0.1916 91 0.38 70
IV.MMO1.HNZ. 2019-08-21T11:17:29.92 0.6 undecidable manual P 18 0.2365 90 0.52 44
IV.GAVE.EHZ. 2019-08-21T11:17:29.34 1.0 negative manual P 274 0.2464 90 -0.23 24
IV.NRCA.HHZ. 2019-08-21T11:17:28.29 0.1 negative manual P 332 0.1799 91 -0.15 98
IV.MTRA.EHZ. 2019-08-21T11:17:27.92 0.1 undecidable manual P 56 0.1484 91 0.03 100
IV.SMA1.EHZ. 2019-08-21T11:17:27.16 0.3 undecidable manual P 119 0.0899 120 0.23 73
IV.LNSS.HHZ. 2019-08-21T11:17:27.85 0.3 undecidable manual P 243 0.1556 91 -0.17 73
IV.T1299.HNZ. 2019-08-21T11:17:26.68 0.3 undecidable manual P 135 0.0558 141 0.19 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:1.2 0.0001375 0.14 AML other m 2019-08-21T11:17:30.74
IV.LNSS.HHE. ML:0.9 7.065E-5 0.48 AML other m 2019-08-21T11:17:30.68
IV.LNSS.HHN. ML:1 7.635E-5 0.48 AML other m 2019-08-21T11:17:30.74
IV.MTRA.EHE. ML:1.2 0.000122 0.3 AML other m 2019-08-21T11:17:30.68
IV.NRCA.HHN. ML:0.9 6.055E-5 0.1 AML other m 2019-08-21T11:17:31.53
IV.NRCA.HHE. ML:1.3 0.0001545 0.16 AML other m 2019-08-21T11:17:31.53
IV.GAVE.EHE. ML:0.9 4.08E-5 1.68 AML other m 2019-08-21T11:17:33.13
IV.TERO.HHN. ML:0.9 3.37E-5 0.06 AML other m 2019-08-21T11:17:34.44
IV.GAVE.EHN. ML:0.9 4.36E-5 0.44 AML other m 2019-08-21T11:17:34.44
IV.TERO.HHE. ML:0.7 2.71E-5 0.08 AML other m 2019-08-21T11:17:35.26
IV.PE3.EHN. ML:3.3 0.00125 0.08 AML other m 2019-08-21T11:17:52.25
IV.PE3.EHE. ML:2.9 0.0004865 0.1 AML other m 2019-08-21T11:18:00.44
IV.MAGA.HHE. ML:3.2 9.575E-5 0.82 AML other m 2019-08-21T11:19:01.07
IV.MAGA.HHN. ML:2.9 5.145E-5 1.48 AML other m 2019-08-21T11:19:06.75
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