Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 26-07-2020 and time 18:56:38 (Italy) in region 3 km SW Montemonaco (AP)

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

  • 26-07-2020 16:56:38 (UTC)
  • 26-07-2020 18:56:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8860, 13.2970 at 20 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montemonaco AP 3 604 604
Montegallo AP 6 523 1127
Montefortino FM 7 1178 2305
Amandola FM 12 3629 5934
Castelsantangelo sul Nera MC 12 281 6215
Comunanza AP 13 3166 9381
Arquata del Tronto AP 13 1178 10559
Palmiano AP 13 196 10755
Bolognola MC 13 142 10897
Ussita MC 14 444 11341
Roccafluvione AP 15 2010 13351
Acquasanta Terme AP 16 2916 16267
Venarotta AP 16 2066 18333
Sarnano MC 17 3264 21597
Montefalcone Appennino FM 18 424 22021
Visso MC 18 1107 23128
Smerillo FM 18 365 23493
Force AP 18 1354 24847
Acquacanina MC 19 121 24968
Norcia PG 20 4957 29925
Monte San Martino MC 20 765 30690

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km NW of Teramo (54892 inhabitants)
49 Km E of Foligno (57155 inhabitants)
60 Km N of L'Aquila (69753 inhabitants)
64 Km NE of Terni (111501 inhabitants)
78 Km E of Perugia (166134 inhabitants)
81 Km NW of Montesilvano (53738 inhabitants)
83 Km S of Ancona (100861 inhabitants)
88 Km NW of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.0 2020-07-26
16:56:38		 42.8857 13.2972 20 2020-07-26
17:02:50		 Sala Sismica INGV-Roma 81376921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-26 16:56:38 ± 0.11
Latitude 42.8857 ± 0.0045
Longitude 13.2972 ± 0.0086
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81376921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 675
Semi-minor axis of confidence ellipse (meter) 435
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 60
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.46585
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 81376921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-26 17:02:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-07-26T16:56:55.75 0.3 undecidable manual S 342 51.7038 103 0.67 57
IV.RM33.EHZ. 2020-07-26T16:56:52.83 0.3 undecidable manual S 189 42.3243 107 0.17 69
IV.SMA1.EHZ. 2020-07-26T16:56:49.24 0.6 undecidable manual S 174 28.4493 117 0.03 48
IV.PF6.EHZ. 2020-07-26T16:56:49.23 0.3 undecidable manual S 343 29.2485 116 -0.16 72
IV.CSP1.EHZ. 2020-07-26T16:56:48.20 0.3 undecidable manual S 342 24.0537 122 0.01 73
IV.FDMO.HHZ. 2020-07-26T16:56:47.82 0.6 undecidable manual S 315 23.8539 122 -0.33 47
IV.EL6.EHZ. 2020-07-26T16:56:47.97 0.3 undecidable manual P 342 51.7038 103 -0.12 70
IV.MF5.EHZ. 2020-07-26T16:56:47.30 0.3 undecidable manual S 49 17.3715 133 0.53 67
IV.TERO.HHZ. 2020-07-26T16:56:46.19 0.1 undecidable manual P 139 38.4282 109 0.08 95
IV.MTRA.EHZ. 2020-07-26T16:56:46.50 0.6 undecidable manual S 150 16.4724 135 -0.09 48
IV.RM33.EHZ. 2020-07-26T16:56:46.60 0.3 undecidable manual P 189 42.3243 107 -0.08 70
IV.MC2.EHZ. 2020-07-26T16:56:45.48 0.1 undecidable manual S 288 9.2796 152 0.04 100
IV.MMO1.EHZ. 2020-07-26T16:56:44.71 0.1 undecidable manual S 58 2.8971 171 -0.17 97
IV.PF6.EHZ. 2020-07-26T16:56:44.62 0.3 undecidable manual P 343 29.2485 116 -0.18 71
IV.MNTT.EHE. 2020-07-26T16:56:44.61 0.1 undecidable manual P 51 31.1466 114 -0.46 88
IV.CSP1.EHZ. 2020-07-26T16:56:44.11 0.1 negative manual P 342 24.0537 122 0 97
IV.SMA1.EHZ. 2020-07-26T16:56:44.67 0.1 positive manual P 174 28.4493 117 -0.03 96
IV.MF5.EHZ. 2020-07-26T16:56:43.77 0.1 undecidable manual P 49 17.3715 133 0.48 90
IV.FDMO.HHZ. 2020-07-26T16:56:43.87 0.6 undecidable manual P 315 23.8539 122 -0.21 48
IV.MTRA.EHZ. 2020-07-26T16:56:43.15 0.1 undecidable manual P 150 16.4724 135 -0.03 98
IV.MMO1.EHZ. 2020-07-26T16:56:42.10 0.1 undecidable manual P 58 2.8971 171 -0.1 100
IV.MC2.EHZ. 2020-07-26T16:56:42.56 0.1 undecidable manual P 288 9.2796 152 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:0.9 0.0000453 0.5 AML other m 2020-07-26T16:56:47.56
IV.MTRA.EHE. ML:0.9 0.00004654999999999999 1.28 AML other m 2020-07-26T16:56:47.07
IV.FDMO.HHN. ML:1.0 0.000052249999999999996 0.18 AML other m 2020-07-26T16:56:48.12
IV.CSP1.EHE. ML:1.2 0.0000751 0.24 AML other m 2020-07-26T16:56:48.44
IV.CSP1.EHN. ML:1.2 0.00008085 0.24 AML other m 2020-07-26T16:56:48.35
IV.FDMO.HHE. ML:1.0 0.000044 1.42 AML other m 2020-07-26T16:56:48.73
IV.SMA1.EHN. ML:1.2 0.00006470000000000001 0.26 AML other m 2020-07-26T16:56:49.54
IV.SMA1.EHE. ML:1.1 0.000052699999999999993 0.58 AML other m 2020-07-26T16:56:49.55
IV.TERO.HHN. ML:0.9 0.00002485 0.1 AML other m 2020-07-26T16:56:52.93
IV.TERO.HHE. ML:0.8 0.00002005 0.94 AML other m 2020-07-26T16:56:53.17
IV.RM33.EHN. ML:1.1 0.00003835 0.28 AML other m 2020-07-26T16:56:53.66
IV.RM33.EHE. ML:1.1 0.000034200000000000005 0.1 AML other m 2020-07-26T16:56:54.07
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download