Earthquake with magnitude of ML 1.1 on date 26-09-2019 and time 00:01:00 (Italy) in region 4 km W Arquata del Tronto (AP)

A magnitude ML 1.1 earthquake occured in region: 4 km W Arquata del Tronto (AP), on

  • 25-09-2019 22:01:00 (UTC)
  • 26-09-2019 00:01:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.25 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
Arquata del Tronto AP 4 1178 1178
Accumoli RI 9 667 1845
Montegallo AP 10 523 2368
Acquasanta Terme AP 13 2916 5284
Norcia PG 13 4957 10241
Montemonaco AP 15 604 10845
Castelsantangelo sul Nera MC 15 281 11126
Amatrice RI 17 2657 13783
Cittareale RI 19 482 14265
Montefortino FM 20 1178 15443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Teramo (54892 inhabitants)
49 Km E of Foligno (57155 inhabitants)
49 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
79 Km E of Perugia (166134 inhabitants)
86 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
96 Km S of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km NE of Tivoli (56533 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 2019-09-25
22:01:00
42.78 13.25 11 2019-09-25
22:06:05
Sala Sismica INGV-Roma 72774621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-25 22:01:00 ± 0.09
Latitude 42.78 ± 0.00
Longitude 13.25 ± 0.01
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72774621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 599
Semi-minor axis of confidence ellipse (meter) 423
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 127
Circular confidence region, given by single value of horizontal uncertainty (meter) 600
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.10792
Epicentral distance of station farthest from the epicenter (degree) 0.31476
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 15
Type of magnitude ML
Reference to an origin 72774621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-25 22:06:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2019-09-25T22:01:12.03 0.3 undecidable manual S 252 0.277 50 0.54 65
IV.CSP1.EHZ. 2019-09-25T22:01:12.48 0.3 undecidable manual S 354 0.3148 50 -0.14 71
IV.FDMO.HHZ. 2019-09-25T22:01:11.40 0.3 undecidable manual S 335 0.2842 50 -0.32 69
IV.MF5.EHZ. 2019-09-25T22:01:11.59 0.3 undecidable manual S 36 0.2581 50 0.65 62
IV.LNSS.HHZ. 2019-09-25T22:01:10.29 0.3 undecidable manual S 222 0.2347 50 0.04 73
IV.MC2.EHZ. 2019-09-25T22:01:07.53 0.3 undecidable manual S 341 0.1403 124 0.29 71
IV.CSP1.EHZ. 2019-09-25T22:01:07.24 0.6 negative manual P 354 0.3148 50 -0.34 45
IV.FDMO.HHZ. 2019-09-25T22:01:06.67 0.3 undecidable manual P 335 0.2842 50 -0.4 67
IV.MF5.EHZ. 2019-09-25T22:01:06.76 0.3 positive manual P 36 0.2581 50 0.14 72
IV.MTRA.HNZ. 2019-09-25T22:01:06.16 0.6 undecidable manual S 102 0.1079 131 -0.09 50
IV.GAVE.EHZ. 2019-09-25T22:01:06.83 0.6 negative manual P 252 0.277 50 -0.1 48
IV.NRCA.HHZ. 2019-09-25T22:01:06.50 0.3 undecidable manual S 298 0.1151 130 0.04 75
IV.MMO1.EHZ. 2019-09-25T22:01:06.91 0.3 undecidable manual S 24 0.1322 126 -0.08 74
IV.LNSS.HHZ. 2019-09-25T22:01:05.96 0.1 undecidable manual P 222 0.2347 50 -0.25 94
IV.NRCA.HHZ. 2019-09-25T22:01:04.07 0.1 negative manual P 298 0.1151 130 0.04 100
IV.MMO1.EHZ. 2019-09-25T22:01:04.27 0.1 negative manual P 24 0.1322 126 -0.06 99
IV.MC2.EHZ. 2019-09-25T22:01:04.54 0.6 negative manual P 341 0.1403 124 0.06 50
IV.MTRA.HNZ. 2019-09-25T22:01:03.91 0.6 negative manual P 102 0.1079 131 0 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.2 0.000164341435 0.1152 AML other m 2019-09-25T22:01:06.26
IV.MTRA.EHN. ML:1.1 0.0001366929 0.192 AML other m 2019-09-25T22:01:06.72
IV.MTRA.HNE. ML:1.2 0.0001868293 0.128 AML other m 2019-09-25T22:01:06.46
IV.NRCA.HHE. ML:1.7 0.00055847735 0.0768 AML other m 2019-09-25T22:01:06.78
IV.NRCA.HHN. ML:1.5 0.0003131953 0.0768 AML other m 2019-09-25T22:01:06.65
IV.NRCA.HNE. ML:1.7 0.000510439 0.0768 AML other m 2019-09-25T22:01:06.78
IV.NRCA.HNN. ML:1.4 0.00027912815 0.0768 AML other m 2019-09-25T22:01:06.66
IV.LNSS.HHE. ML:1.1 6.782955E-5 0.1024 AML other m 2019-09-25T22:01:11.62
IV.LNSS.HHN. ML:1.1 7.275933E-5 0.1664 AML other m 2019-09-25T22:01:10.47
IV.FDMO.HHE. ML:0.7 2.37307715E-5 0.1024 AML other m 2019-09-25T22:01:11.64
IV.FDMO.HHN. ML:0.8 2.782149E-5 0.1408 AML other m 2019-09-25T22:01:11.67
IV.GAVE.EHE. ML:0.9 4.101869E-5 0.2944 AML other m 2019-09-25T22:01:12.90
IV.GAVE.EHN. ML:1 4.33310425E-5 0.2048 AML other m 2019-09-25T22:01:14.34
IV.CSP1.EHE. ML:0.8 2.5954255E-5 0.4096 AML other m 2019-09-25T22:01:13.10
IV.CSP1.EHN. ML:1 4.126731E-5 0.3968 AML other m 2019-09-25T22:01:14.85
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